And Moses was learned in all the wisdom of the Egyptians, and was mighty in words and in deeds.

And Moses was instructed in all the wisdom of the Egyptians; and he was mighty in his words and in his deeds.

and Moses was taught in all wisdom of the Egyptians, and he was powerful in words and in works.

So Moses was educated in all the learning of the Egyptians, and possessed great influence through his eloquence and his achievements.

And Moses was trained in all the wisdom of Egypt, and was great in his words and works.

So Moses was educated in all the learning of the Egyptians, and proved his ability both by his words and actions.

Whereas Luke reporteth that he was taught in all wisdom of the Egyptians, he putteth that in his commendation as a point of excellency. Notwithstanding, it might have so fallen out, as it doth oftentimes, that being puffed up with profane sciences, he might have despised the base common people; yet because God had determined to redeem his people, he doth, in the mean season, frame both the mind of Moses and all other things to finish his work. The reason of man's flesh [1] should murmur in this place, Why doth God wink at so long miseries of the people? Why doth he suffer Pharaoh to rage more cruelly daily? Why doth he not suffer Moses to grow up amongst his own people? Why doth he after a sort cut him off from the kindred of Israel, being adopted by the king's daughter? Why will he suffer him to remain amidst courtly pleasures, [2] and doth not rather pull him thence? But the end itself is so wonderful, that we are enforced to confess that all these things were governed by singular counsel and order to set forth the glory of God. Whereas I said that Luke speaketh in this place of the learning of the Egyptians for honor's sake, I would not have it so taken as if there were in the same no corruption. Forasmuch as astrology [3] doth consider the wonderful workmanship of God, not only in the placing of the stars, and in such excellent variety, but also in their moving, force, and secret offices, it is a science both profitable and worthy of praise. The Egyptians bestowed great study in this, but being not content with the simple order of nature, they wandered also into many foolish speculations, as did the Chaldeans. It is uncertain whether Moses was infected with these superstitions or no. Yet, howsoever it be, we see how sincerely and plainly he setteth that before us to be considered in the frame of the world, which is appertinent unto godliness. Surely this was excellent modesty, in that he which could reason with learned and witty men of the secrets of nature, doth not only omit higher subtleties, but doth also descend unto the common capacity of every most simple man, and doth, in a common style, set forth unto men unlearned those things which they perceive by experience. When Justinian [Justin] babbleth concerning Moses, he maketh him a magician, which, with juggling and enchantments, made passage for the people through the Red Sea; so that Satan did not only go about to bury the power of God, but also to blaspheme the same. But we know that Moses did not strive with the enchanters by magic, but did that only which God had enjoined him. Furthermore, the Egyptians had mystical divinity, wherewith they colored their doting inventions and monstrous abominations, as if they would prove that they went mad not without reason: as the Papists, whereas they delude and mock men like stage-players, in their mass and other foolish rites, yet they invent mysteries, that they may persuade men that there is nothing there but that which is divine. The common sort of priests cannot climb so high, but those which amongst them will be accounted more cunning [4] do omit no rite, how foolish and childish soever it be, affirming that there is some spiritual mystery in every [one] of them. There is extant concerning this matter a most foolish mingle-mangle, which they call the Rationall [Rationale] of Divine Offices. But forasmuch as sacrificing priests alone did use such dotings amongst themselves, it is not to be thought that Moses spent any time in these, whose bringing up was princely, but that he was taught in liberal arts. He was mighty. This phrase doth express among the Hebrews a double excellency, when as he which doth excel in wit and learning, is also apt to attempt and bring to pass great and weighty matters. [5] Stephen's meaning is, therefore, that Moses was furnished with rare gifts, so that they did all confess that he was a singular man. But seeing he was in such estimation, the Israelites had the less hope that he should be the minister which should work their deliverance.

Footnotes

1 - "Carnis ratio," carnal reason.

2 - "Ad annum quadragesimum," till his fortieth year.

3 - "Astrologia," astrology, or, more properly here, astronomy.

4 - "Perspicaces," clear-sighted.

5 - "Ad res praeclaras gerendas aptus est," is fitted for greater exploits.

Moses was learned - Or, was "instructed." It does not mean that he had that learning, but that he was carefully "trained" or educated in that wisdom. The passage does not express the fact that Moses was distinguished for "learning," but that he was carefully "educated," or that pains were taken to make him learned.
In all the wisdom - The learning of the Egyptians was confined chiefly to astrology, to the interpretation of dreams, to medicine, to mathematics, and to their sacred science or traditionary doctrines about religion, which were concealed chiefly under their hieroglyphics. Their learning is not infrequently spoken of in the Scriptures, 1-Kings 4:30; compare Isaiah 19:11-12. Their knowledge is equally celebrated in the pagan world. It is known that science was carried from Egypt to Phoenicia, and thence to Greece; and not a few of the Grecian philosophers traveled to Egypt in pursuit of knowledge. Herodotus himself frankly concedes that the Greeks derived very much of their knowledge from Egypt. (See Rawlinson's Herodotus, vol. 2, pp. 80, 81; Herodotus, bk. 2, pp. 50, 51.)
And was mighty - Was powerful, or was distinguished. This means that he was eminent in Egypt before he conducted the children of Israel forth. It refers to his addresses to Pharaoh, and to the miracles which he performed "before" their departure.
In words - From Exodus 4:10, it seems that Moses was "slow of speech, and of a slow tongue." When it is said that he was mighty in words, it means that he was mighty in his communications to Pharaoh, though they were spoken by his brother Aaron. Aaron was in his place, and "Moses" addressed Pharaoh through him, who was appointed to deliver the message, Exodus 4:11-16.
Deeds - Miracles, Exodus. 7, etc.

In all the wisdom of the Egyptians - Who were, at that time, the most intelligent and best instructed people in the universe. Philo says, Moses was taught arithmetic, geometry, poetry, music, medicine, and the knowledge of hieroglyphics. In Sohar Cadash, fol. 46, it is said, "that, of the ten portions of wisdom which came into the world, the Egyptians had nine, and that all the inhabitants of the earth had only the remaining portion." Much of the same nature may be seen in the rabbins, though they apply the term wisdom here to magic.
Was mighty in words and in deeds - This may refer to the glorious doctrines he taught, and the miracles he wrought in Egypt. Josephus Ant. lib. ii. cap. 10, sect. 1, gives an account of his being general of an Egyptian army, defeating the Ethiopians, who had invaded Egypt, driving them back into their own country, and taking Saba their capital, which was afterwards called Meroe. But this, like many other tales of the same writer, is worthy of little credit.
Phoenix says the same of Achilles: -
Μυθων τε ῥητηρ' εμεναι, πρηκτηρα τε εργων.
Il. ix. v. 443.
Not only an orator of words, but a performer of deeds.

And Moses was learned in all the wisdom of the Egyptians, Which was reckoned very considerable: 1-Kings 4:30 Philo the Jew says (e) that he learned arithmetic, geometry, and every branch of music, the hieroglyphics, the Assyrian language, and the Chaldean knowledge of the heavens, and the mathematics; yet was not a magician, or skilled in unlawful arts, as Justin suggests (f):
and was mighty in words; he had a command of language, and a large flow of words, and could speak properly and pertinently upon any subject; for though he was slow of speech, and of tongue, and might have somewhat of a stammering in speaking, yet he might have a just diction, a masculine style, and a powerful eloquence, and the matter he delivered might be very great and striking:
and in deeds; or in "his deeds", as the Alexandrian copy, the Vulgate Latin, Syriac, and Ethiopic versions read: he was a man of great abilities, and fit for business both in the cabinet and in the field. Josephus (g) relates an expedition of his against the Ethiopians, whilst he was in Pharaoh's court, in which he obtained victory over them, when the Egyptians had been greatly oppressed by them; in which his prudence and fortitude were highly commended.
(e) De Vita Mosis, l. 1. p. 859. Clement. Alex. Strom. l. 1. p. 343. (f) L. 36. c. 2. (g) Antiqu l. 2. c. 10. sect. 1. 2. 3.

mighty in words--Though defective in utterance (Exodus 4:10); his recorded speeches fully bear out what is here said.
and deeds--referring probably to unrecorded circumstances in his early life. If we are to believe JOSEPHUS, his ability was acknowledged ere he left Egypt.

Moses was learned. He was reared as "the son of Pharaoh's daughter" (Hebrews 11:24), and would be educated in all the accomplishments of his time. We know from the researches of the Egyptologists (see Rawlinson's Egypt) that at the period of Moses there were great universities for the education of all who were expected to engage in public employments. Eber's Uarda gives a good picture of Egypt when Moses was a child.

In all the wisdom of the Egyptians - Which was then celebrated in all the world, and for many ages after. And mighty in words - Deep, solid, weighty, though not of a ready utterance.