For he looketh to the ends of the earth. Man is conditioned. God is unconditioned. Man's knowledge has strict and narrow limits. God "looketh unto the ends of the earth." It is the universality of God's knowledge that makes each item of it perfect.
Where knowledge is circumscribed, it is impossible to be sure that some truth outside the circle of the person's cognizance has not a bearing on that which is within his cognizance—a bearing, which, if he were aware of it, would give the truth a different aspect.
With God alone there are no such limits, everything being within his cognizance. And seeth under the whole heaven. As his knowledge of earthly things is unlimited, so is his knowledge of heavenly things also; and not only of heavenly things in a material sense, as of sun, moon, stars, comets, planets, nebulae, etc; but also of causes, principles, ends, laws, and the like, whereby both material and immaterial things are governed, ordered, and maintained in being.
Of matters of this kind and character man can only say, "Such knowledge is too wonderful for me; I cannot attain unto it" (Psalms 139:6).