The following is from Matthew Henry's Commentary on the creation of Eve:
Yet man being made last of the creatures, as the best and most excellent of all, Eve's being made after Adam, and out of him, puts an honour upon that sex, as the glory of the man, 1 Cor. xi. 7. If man is the head, she is the crown, a crown to her husband, the crown of the visible creation. The man was dust refined, but the woman was dust double-refined, one remove further from the earth.
2. That Adam slept while his wife was in making, that no room might be left to imagine that he had herein directed the Spirit of the Lord, or been his counsellor, Isa. xl. 13. He had been made sensible of his want of a meet help; but, God having undertaken to provide him one, he does not afflict himself with any care about it, but lies down and sleeps sweetly, as one that had cast all his care on God, with a cheerful resignation of himself and all his affairs to his Maker's will and wisdom.
Jehovah-jireh, let the Lord provide when and whom he pleases. If we graciously rest in God, God will graciously work for us and work all for good.
3. That God caused a sleep to fall on Adam, and made it a deep sleep, that so the opening of his side might be no grievance to him; while he knows no sin, God will take care he shall feel no pain. When God, by his providence, does that to his people which is grievous to flesh and blood, he not only consults their happiness in the issue, but by his grace he can so quiet and compose their spirits as to make them easy under the sharpest operations.
4. That the woman was made of a rib out of the side of Adam; not made out of his head to rule over him, nor out of his feet to be trampled upon by him, but out of his side to be equal with him, under his arm to be protected, and near his heart to be beloved. Adam lost a rib, and without any diminution to his strength or comeliness (for, doubtless, the flesh was closed without a scar); but in lieu thereof he had a help meet for him, which abundantly made up his loss: what God takes away from his people he will, one way or other, restore with advantage.
In this (as in many other things) Adam was a figure of him that was to come; for out of the side of Christ, the second Adam, his spouse the church was formed, when he slept the sleep, the deep sleep, of death upon the cross, in order to which his side was opened, and there came out blood and water, blood to purchase his church and water to purify it to himself. See Eph. v. 25, 26.