The beauty of mathematics is that it is eternal, it doesn't change.
The past is not a fixed point but a fluid memory that shifts with each retelling.
I believe in taking care of myself, in a balanced diet, in a rigorous exercise routine.
自由的本质在于能够在不受他人任意干涉的情况下追求个人目标。
教育的最大的秘诀是:使身体锻炼和思想锻炼互相调剂。