Psychology must be based on facts, not hypotheses.
Success comes from focusing on what you can control and letting go of what you cannot.
The difference between perseverance and obstinacy is that one comes from a strong will, and the other from a strong won’t.
有时候遇到急切之下弄不明白的事情，应当适当宽缓一下，或许自然而然就真相大白了，不要操之过急，那样会使当事人十分恼怒，反而增加了事情的复杂性；有的人急切之下任你怎么劝都不听从，不妨随他的便，不去劝他，他或许自己慢慢就会悔悟，不必要采用强制手段逼迫他听从，那样只能激发他的逆反心理，使他更加冥顽不化。
Understanding the intricacies of the world is essential to attaining wisdom.
La poesía es el eco de la melodía del universo en el corazón de los humanos.