“Good and evil both increase at compound interest.  That is why the little decisions you and I make every day are of such infinite importance.  The smallest good act today is the capture of a strategic point from which, a few months later, you may be able to go on to victories you never dreamed of.  An apparently trivial indulgence in lust or anger today is the loss of a ridge or railway line or bridgehead from which the enemy may launch an attack otherwise impossible.”

– C.S. Lewis