Thou now sendest thy servant away From this song it is sufficiently evident, that Simeon looked at the Son of God with different eyes from the eyes of flesh. For the outward beholding of Christ could have produced no feeling but contempt, or, at least, would never have imparted such satisfaction to the mind of the holy man, as to make him joyful and desirous to die, from having reached the summit of his wishes. The Spirit of God enlightened his eyes by faith, to perceive, under a mean and poor dress, the glory of the Son of God. He says, that he would be sent away in peace; which means, that he would die with composure of mind, having obtained all that he desired. But here a question arises. If he chose rather to depart from life, was it amidst distress of mind and murmuring, as is usually the case with those who die unwillingly, that Simeon was hurried away? I answer: we must attend to the circumstance which is added, according to thy word God had promised that Simeon would behold his Son. He had good reason for continuing in a state of suspense, and must have lived in some anxiety, till he obtained his expectation. This ought to be carefully observed; for there are many who falsely and improperly plead the example of Simeon, and boast that they would willingly die, if this or the other thing were previously granted to them; while they allow themselves to entertain rash wishes at their own pleasure, or to form vain expectations without the authority of the Word of God. If Simeon had said exactly, "Now I shall die with a composed and easy mind, because I have seen the Son of God," this expression would have indicated the weakness of his faith; but, as he had the word, he might have refused to die until the coming of Christ.

Now lettest - Now thou "dost" let or permit. This word is in the indicative mood, and signifies that God was permitting him to die in peace, by having relieved his anxieties, allayed his fears, fulfilled the promises, and having by the appearing of the Messiah, removed every reason why he should live any longer, and every wish to live.
Depart - Die.
According to thy word - Thy promise made by revelation. God never disappoints. To many it might have appeared improbable, when such a promise was made to an old man, that it should be fulfilled. But God fulfils all his word, keeps all his promises, and never disappoints those who trust in him.

Lord, now lettest thou thy servant depart in peace - Now thou dismissest, απολυεις, loosest him from life; having lived long enough to have the grand end of life accomplished.
According to thy word - It was promised to him, that he should not die till he had seen the Lord's anointed, Luke 2:26; and now, having seen him, he expects to be immediately dismissed in peace into the eternal world; having a full assurance and enjoyment of the salvation of God. Though Simeon means his death, yet the thing itself is not mentioned; for death has not only lost its sting, but its name also, to those who have, even by faith, seen the Lord's anointed.

Lord, now (l) lettest thou thy servant depart in peace, according to thy (m) word:
(l) Let me depart out of this life, to be joined to my Father.
(m) As you promised me.

Lord, now lettest thou thy servant,.... He acknowledges him as his Lord, and to have a despotic power over him with respect to life and death; and himself as his servant, which he was, both by creation and grace: and though it expresses humiliation, and a sense of distance and unworthiness, yet to be a servant of the most high God, is a very high and honourable character: what he requests of the Lord is that he might
depart in peace; signifying his hearty desire to die, and with what cheerfulness he should meet death, having obtained all that he could wish for and desire, in seeing and embracing the Saviour: he expresses his death, by a departure out of the world, as in John 13:1 Philippians 1:21 agreeably to the way of speaking of it among the Jews. See Gill on Philippians 1:21 and by a word, which signifies a loosing of bonds; death being a dissolving the bond of union, between soul and body, and a deliverance, as from prison and bondage; the body being, as it were, a prison to the soul in the present state of things: and he also intimates, that whereas, though he had the strongest assurances of the Messiah's coming, and of his coming before his death, by the revelation of the Holy Ghost, and so most firmly believed it, without fluctuation, and hesitation of mind; yet as hope deferred makes the heart sick, he was anxious and restless in his desire, till it was accomplished; but now being come, he could take his leave of the world, and his entrance into eternity, with the greatest calmness and tranquillity of mind, having nothing to disturb him, nor more to desire: he adds,
according to thy word; for he seems to have understood by the revelation made to him, that as he should not die before he saw the Messiah, so, when he had seen him, that he should immediately, or in a very short time after, be removed by death; and which he greatly desired, and in which, he sinned not, because his request was according to the word of God: whereas often, desires of death are not only without the word of God, and due resignation to his will, and any regard to his glory, but to be rid of some trouble, or gratify some lust, as pride, revenge, &c.

Lord--"Master," a word rarely used in the New Testament, and selected here with peculiar propriety, when the aged saint, feeling that his last object in wishing to live had now been attained, only awaited his Master's word of command to "depart."
now lettest, &c.--more clearly, "now Thou art releasing Thy servant"; a patient yet reverential mode of expressing a desire to depart.