In whom are all the treasures. The expression in quo (in whom, or in which) may either have a reference collectively to everything he has said as to the acknowledgment of the mystery, or it may relate simply to what came immediately before, namely, Christ. While there is not much difference between the one or the other, I rather prefer the latter view, and it is the one that is more generally received. The meaning, therefore, is, that all the treasures of wisdom and knowledge are hid in Christ -- by which he means, that we are perfect in wisdom if we truly know Christ, so that it is madness to wish to know anything besides Him. For since the Father has manifested himself wholly in Him, that man wishes to be wise apart from God, who is not contented with Christ alone. Should any one choose to interpret it as referring to the mystery, the meaning will be, that all the wisdom of the pious is included in the gospel, by means of which God is revealed to us in his Son. He says, however, that the treasures are hidden, because they are not seen glittering with great splendor, but do rather, as it were, lie hid under the contemptible abasement and simplicity of the cross. For the preaching of the cross is always foolishness to the world, as we found stated in Corinthians. (1-Corinthians 1:18.) I do not reckon that there is any great difference between wisdom and understanding in this passage, for the employment of two different terms serves only to give additional strength, as though he had said, that no knowledge, erudition, learning, wisdom, can be found elsewhere.

In whom - Margin, "wherein." The more correct translation is "in whom." The reference is doubtless to Christ, as his name is the immediate antecedent, and as what is affirmed here properly appertains to him.
Are hid - Like treasures that are concealed or garnered up. It does not mean that none of those "treasures" had been developed; but that, so to speak, Christ, as Mediator, was the great treasure-house where were to be found all the wisdom and knowledge needful for people.
All the treasures - It is common to compare any thing valuable with "treasures" of silver or gold. The idea here is, that in reference to the wisdom and knowledge needful for us, Christ is what abundant treasures are in reference to the supply of our wants.
Wisdom - The wisdom needful for our salvation. Notes, 1-Corinthians 1:24.
And knowledge - The knowledge which is requisite to guide us in the way to life. Christ is able to instruct us in all that it is desirable for us to know, so that it is not necessary for us to apply to philosophy, or to the teachings of human beings.

In whom are hid - Or rather in which; referring to the mystery mentioned above. In this glorious scheme of Christianity all the treasures - the abundance and excellency, of wisdom and knowledge are contained. No scheme of salvation, or Divine knowledge, ever equalled in its depth and excellency the Gospel plan. A scheme which the wisdom of God alone could devise, and which his power and infinite mercy alone could accomplish.

In whom are hid all the treasures of (d) wisdom and knowledge.
(d) There is no true wisdom outside of Christ.

In whom are hid all the treasures of wisdom and knowledge. This may be understood either of the mystery of the Gospel, which contains the rich mines and hidden treasures of all divine truths; so called, because of the richness and intrinsic value and excellency of them; and because of their variety and abundance, being the unsearchable riches of Christ: or of Christ himself; and not so much of his personal wisdom, either as God, being the all-wise God, the wisdom of God, an omniscient Being, that knows all persons and things whatever, within the whole circle of wisdom and knowledge; or as man, whose wisdom and knowledge, though created, was very large and abundant; or as Mediator, on whom the spirit of wisdom and understanding, of counsel and of knowledge, rests; but of that fulness of truth as well as grace, which dwells in him as in its subject and fountain; by whom it comes, and from whom it is derived unto us; and our highest wisdom and knowledge lies in knowing him, whom to know is life eternal; and the excellency of whose knowledge surpasses everything else; it is the greatest riches, and most valuable treasure; nor is there anything worth knowing but what is in Christ, all is laid up in him: and being said to be "hid" in him, shows the excellency of the wisdom and knowledge that is in him only valuable things being hid, or compared to hid treasure; that this cannot be had without knowing him; that it is imperfect in the present state, and is not yet fully and clearly revealed; and therefore should be inquired after, and searched for, and Christ should be applied unto for it: , "treasures of wisdom", is a phrase used by the Targumist (q),
(q) Jonathan ben Uzziel in Exod. xl. 4.

Translate in the Greek order, "In whom (not as ALFORD, 'in which') mystery; Christ is Himself the 'mystery' (Colossians 2:2; 1-Timothy 3:16), and to Christ the relative refers) are all the treasures of wisdom and knowledge hidden." The "all" here, answers to "all" in Colossians 2:2; as "treasures" answer to the "riches"; it is from the treasures that the riches (Colossians 2:2) are derived. "Are" is the predicate of the sentence; all the treasures ARE in Him; hidden is predicated of the state or manner in which they are in Him. Like a mine of unknown and inexhaustible wealth, the treasures of wisdom are all in Him hidden, but not in order to remain so; they only need to be explored for you to attain "unto the riches" in them (Colossians 2:2); but until you, Colossians, press after attaining the full knowledge (see on Colossians 2:2) of them, they remain "hidden." Compare the parable, Matthew 13:44, "treasure hid." This sense suits the scope of the apostle, and sets aside ALFORD'S objection that "the treasures are not hidden, but revealed." "Hidden" plainly answers to "mystery" (Colossians 2:2), which is designed by God, if we be faithful to our privileges, not to remain hidden, but to be revealed (compare 1-Corinthians 2:7-8). Still as the mine is unfathomable, there will, through eternity, be always fresh treasures in Him to be drawn forth from their hidden state.
wisdom--general, and as to experimental and practical truth; whence comes "understanding" (Colossians 2:2).
knowledge--special and intellectual, in regard to doctrinal truth; whence comes "the full knowledge" (Colossians 2:2).