成功不在于成为最好的，而在于比昨天的自己更好。
Success is not about being the best; it's about being better than you were yesterday.
忧伤愁苦，就会心气滞结；忿怨愤怒，就会心气横逆不顺；惊恐畏惧，就会心气沉落不浮；拘谨固执，就会心气郁郁不释；急躁浮躁，就会心气损耗不足。
推动的关键是使期望的行为更加突出、更容易和更有吸引力。
价格会被遗忘，但品质会被长久铭记。
O verdadeiro escritor é aquele que escreve com o coração.
Rigor in proof is what separates mathematics from all other sciences.