#71-1. Laziness is nothing more than the habit of resting before you get tired.
#71-2. Discontent is the first step in the progress of a man or a nation.
#71-3. If your ship hasn't come in, swim out to it.
Each of us has different levels of stamina in different situations so it is best to tap into our energy. Anyone who has accomplished anything of significance has pushed themselves rather than thinking, "This should be enough."
Not being happy with oneself can be a useful motivator for change. It needs to be balanced with periodic bouts of satisfaction for maintaining good mental health. That comes if there is genuine effort towards improvement.
We often waste time and energy complaining about how circumstances and other people are not in our favour, thus missing opportunities for actions we could take. Once we train our mind to be more positive-action-oriented, we will find our actions actually start turning things more in line with our expectations.