daily word - psychology?

Do you see a linkage between psychology and theology? One is the study of human interaction and the other is study of human interaction with God. Could these be related? Could they be the same thing? Consider some content from the Bible that supports this. How can a man say that he loves God whom he cannot see if he cannot love his brother whom he can see? And when did we see you hungry and thirsty and naked and sick and in prison? Verily I say that inasmuch as you have done it unto the least of these, you have done it unto me. The love with which you love me and your love for your brother are the same.