Even if you’re sure you can win, be careful that you can live with what you lose. - Gary W. Keller

Knowing why you're doing something provides the inspiration and motivation to give the extra perspiration needed to persevere when things go south..
..Purpose provides the ultimate glue that can help you stick to the path you've set. When what you do matches your purpose, your life just feels in rhythm, and the path you beat with your feet seems to match the sound in your head and heart. Live with purpose and don't be surprised if you actually hum more and even whistle while you work.

MY WAGE By J. B. Rittenhouse I bargained with Life for a penny, And Life would pay no more, However I begged at evening When I counted my scanty store. For Life is a just employer, He gives you what you ask, But once you have set the wages, Why, you must bear the task. I worked for a menials hire, Only to learn, dismayed, That any wage I had asked of Life, Life would have willingly paid.

Here’s what I found out: We overthink, overplan, and overanalyze our careers, our businesses, and our lives; that long hours are neither virtuous nor healthy; and that we usually succeed in spite of most of what we do, not because of it.