It is interesting to see how Mr. Lovell justifies his acts to himself.  He feels that by returning the money that he (in a sense) stole, he no longer has to feel guilty for his actions, even though it was only a small portion of what he took.  While this is a weakness it seems to also be a strength- as long as he no longer feels sorry he will not be "dead in the water".

Although Mr. Lovell will not admit it, his actions suggest that he feels guilty.  This shows another aspect of conning- he is constantly on-edge.  Even though he is in a sense "retired", he is still afraid of being "dead in the water"