“Regret in any form is pointless, unless it teaches us to be wise. To never let such foolishness happen again.”
Related quotes

Liguori, A. M. (1882). Sunday within the Octave of the Nativity: In What True Wisdom Consists. In N. Callan (Trans.), Sermons for All the Sundays in the Year (Eighth Edition, p. 43). Dublin; London: James Duffy & Sons.

“Let us dream of evanescence, and linger in the beautiful foolishness of things.”
Source: The Book of Tea

2010-, Ai Weiwei Says Blind Dissident’s Escape Will Inspire Chinese, 2012