Il me suffit de penser que rien n'est impossible à qui s'en donne la peine pour me donner du courage.
Le tour du monde en 72 jours
Contexte et précisions
En anglais : I always have a comfortable feeling that nothing is impossible if one applies a certain amount of energy in the right direction. When I want things done, which is always at the last moment, and I am met with such an answer: 'It's too late. I hardly think it can be done;' I simply say: 'Nonsense! If you want to do it, you can do it. The question is, do you want to do it?'