Ignorance is the root and stem of all evil.
The beauty of mathematics is not in its complexity, but in its simplicity and the profound truths it reveals about the universe.
向人求助之时应该去求真正胸襟开阔的人;帮助别人时要帮助真正需要帮助的人。
心有其理,理性对此一无所知。
We must stop just talking about change and start acting.