我想揭示大自然的秘密,用来造福人类。我认为,在我们的短暂一生中,最好的贡献莫过于此了。
Life is short, but there is always time for courtesy.
The true way is along a rope that is not spanned high in the air, but just above the ground. It seems intended more to cause stumbling than to be walked upon.
——在上海中国国民党本部会议演说,1920年11月4日