International Standard Version Is there anyone who can understand his own thoughts except his own inner spirit? In the same way, no one can know the thoughts of God except God's Spirit.
American Standard Version For who among men knoweth the things of a man, save the spirit of the man, which is in him? even so the things of God none knoweth, save the Spirit of God.
Young's Literal Translation for who of men hath known the things of the man, except the spirit of the man that is in him? so also the things of God no one hath known, except the Spirit of God.