快樂是什麼？就是力量增加、克服阻力的感覺。What is happiness? The feeling that power increases, that resistance is overcome.

What is happiness? The feeling that power increases, that resistance is overcome.
— Friedrich Nietzsche, Philosopher
快樂是什麼？就是力量增加、克服阻力的感覺。

– 弗里德里希‧尼采 (1844 – 1900) 德國哲學家，對於宗教、道德、文化、哲學及科學等領域，都有批判性的著作。