“Have you a sufficient substitute?” We mustn’t forget this question in our efforts toward self-improvement. Whether our aim is to get out from under an addiction, break a bad habit, correct a personal shortcoming, or adopt a positive behavior, we require substitution. If we could simply make a decision and successfully follow through, we would have done so long ago. Willpower can produce immediate results, but not lasting results. After a while, we succumb to our previous state because we had neglected a key detail: need.