(This is my brief observation during my time practicing Aikido)
If you like to read books I would like to point you to a nice one. Actually it's a novel, but not only a novel. Suppose you can find there something:
Cognard, André: Le Disciple. Editions Dervy, Paris, 2002. ISBN 2-84454-150-X.
Well, it's written in French. But many people know some French and it's really worth to read.