1Cor.2.11  For what person knows a man's thoughts except the spirit of the man which is in him? So also no one comprehends the thoughts of God except the Spirit of God.
Eph.3.18  may have power to comprehend with all the saints what is the breadth and length and height and depth,

Hyper-concordance v1.1, by Sean Boisen. Scripture verses taken from the Revised Standard Version, copyright 1952, 1971.