世界上充满了显而易见的事物，却没有人注意到它们。
The only way to do great work is to love what you do.
It is not shame for a man to learn that which he knows not，whatever his age.
True progress in farming comes from observing and learning from nature.
The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.