Psalm 139:17 Meaning

15My substance was not hid from thee, when I was made in secret, and curiously wrought in the lowest parts of the earth.

16Thine eyes did see my substance, yet being unperfect; and in thy book all my members were written, which in continuance were fashioned, when as yet there was none of them.

17How precious also are thy thoughts unto me, O God! how great is the sum of them!

18If I should count them, they are more in number than the sand: when I awake, I am still with thee.

19Surely thou wilt slay the wicked, O God: depart from me therefore, ye bloody men.