数学是理性的音乐。

The pain you feel today will be the strength you feel tomorrow.

The spiritual life is the only life worth living.

In times of crisis, transparency builds trust faster than anything else.

The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.

In science, the most important quality is intellectual honesty.

"Illustrations are not just pictures; they are the soul of the story."