The only limit to our realization of tomorrow will be our doubts of today.

Success comes when preparation meets opportunity.

The biggest regret in life is giving up what should not be given up easily, and stubbornly persisting in what should not be persisted.

没有人真正了解其他人。他所能做的最好的事情就是假设他们像他自己一样。

The most effective development interventions are often the simplest ones.

科学的历史是其对象生产的历史。