Man's main task in life is to give birth to himself, to become what he potentially is. The most important product of his effort is his own personality.

思想是行动的仆人，而行动是生存的仆人。

La verdad no es una sola, sino muchas, y cada una tiene su propia voz.

科学家们似乎仍未充分理解，所有地球科学都必须为揭示地球早期状态提供证据，而只有综合所有这些证据才能触及真相。