The problem with motivation is that it works on feelings from the Chimp and these can shift very quickly. Commitment, on the other hand, comes from the Human and does not depend on feelings. Commitment means following a plan even if you don’t feel like it that day. For example, a surgeon can’t say halfway through an operation, ‘Do you know I just don’t feel motivated to finish this, so I’ll stop now!’ Motivation doesn’t matter; it is commitment that will finish the operation.