This clause is so often added, to show that all the disorders, evil and hurtful qualities, that now are in the creatures, are not to be imputed to God, who made all of them good; but to man's sin, which hath corrupted their nature, and perverted their use.
Related Commentaries of Genesis 1:12
Genesis 1:12
12 And the earth brought forth grass, and herb yielding seed after his kind, and the tree yielding fruit, whose seed was in itself, after his kind: and God saw that it was good.