Albert Barnes Commentary Psalms 139:14

"I will give thanks unto thee; for I am fearfully and wonderfully made: Wonderful are thy works; And that my soul knoweth right well." — Psalms 139:14 (ASV)

I will praise you - I will not merely admire what is so great and marvelous, but I will acknowledge you in a public manner as wise, and holy, and good: as entitled to honor, love, and gratitude.

For I am fearfully and wonderfully made - The word rendered “fearfully” means properly “fearful things;” things suited to produce fear or reverence. The word rendered “wonderfully made” means properly to distinguish; to separate. The literal translation of this—as near as can be given—would be, “I am distinguished by fearful things;” that is, by things in my creation which are suited to inspire awe. I am distinguished among your works by things which tend to exalt my ideas of God, and to fill my soul with reverent and devout feelings.

The idea is that he was “distinguished” among the works of creation, or so “separated” from other things in his endowments as to cause a sense of awe in the mind. He was made different from inanimate objects and from the brute creation; he was made in such a way, in the entire structure of his frame, as to fill the mind with wonder. The more anyone contemplates his own bodily formation, becomes acquainted with the anatomy of the human frame, and understands more of his mental organization, the more he will see the force and propriety of the language used by the psalmist.

Marvelous are your works - Fitted are they to excite wonder and admiration. The particular reference here is to his own formation; but the same remark may be made of the works of God in general.

And that my soul knows right well - Margin, as in Hebrew, “greatly.” I am fully convinced of it. I am deeply impressed by it. We can see clearly that the works of God are “wonderful,” even if we can understand nothing else about them.