We usually see only the things we are looking for- so much so that we sometimes see them where they are not.
The heart may think it knows better: the senses know that absence blots people out. We have really no absent friends.
The greatest thing in life is to keep your mind young.
做人的气度要高旷但不可疏漏狂妄；心思要缜密但不可琐碎；趣味要淡但不可枯燥；操守要严明但不可激烈。
True sustainability is about harmony with nature.