No runner wants to crawl across the finish line. Racers practice their pace and know how much energy they need to exert for each mile.
Entrepreneurs need this skill, too.
Go all out in the beginning and you risk having little steam in reserves. Aim for a steady stream of effort and intention, however, and you will have the endurance and patience to persevere through even the most challenging situations.
It matters less how strong you come out of the gate. What is more important is how much effort you can put forth down the line.