The only limits that exist are the ones you place on yourself.
真理是人类精神的自由创造,如果我们自己不产生它,它就永远不会存在。
There is no hope without action.
凡是教师缺乏爱的地方,无论品格还是智慧都不能充分地或自由地发展。
Love is not enough. It has to be tended, like a fire.