"Perseverance is not a long race. It is many short races one after the other." When running multiple short races simultaneously, keep in mind that stamina comes from the effort to endure and the ability to care for one's self along the way: No marathoner has ever won a race without stopping periodically for water and replenishment.
When you are inspired by some great purpose, some extraordinary project, all your thoughts break their bonds: Your mind transcends limitations, your consciousness expands in every direction, and you find yourself in a new, great, and wonderful world. Dormant forces, faculties and talents become alive, and you discover yourself to be a greater person by far than you ever dreamed yourself to be.