Near to his heart to be beloved

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.

[Matthew Henry Commentary on Genesis]