Culled from: http://www.desiringgod.org/articles/jesus-is-fully-human
Jesus also has a human mind. Two key texts make this undeniable:
Luke 2:52: “Jesus increased in wisdom and in stature and in favor with God and man.”
Mark 13:32: “Concerning that day or that hour, no one knows, not even the angels in heaven, nor the Son, but only the Father.”
The second verse, of course, is striking. For Christians who clearly affirm Jesus’ deity, Mark 13:32 seems like trouble. But what looks difficult at first glance proves to be a glorious confirmation of Jesus’ humanity and a very helpful piece in formulating our Christology.
If Jesus is God and God knows everything, how can Jesus not know when his second coming will be?
In addition to being fully divine, Jesus is fully human. He has both an infinite, divine mind and a finite, human mind. He can be said not to know things because he is human and finite—human minds are not omniscient. And Jesus can be said to know all things (John 21:17) because he is divine and infinite in his knowledge.
Paradoxical as it is, we must affirm that Jesus both knows all things anddoesn’t know all things. For the unique, two-natured person of Christ, this is no contradiction but a peculiar glory of the God-man.