The heart of man is so delicate; it is just like a fragile glass, and once it is broken is very difficult to mend. Any hurt and harm once given is never really mended. One can apologize and ask forgiveness; but what is done is done; what is said is said. The word is not lost. Every word we speak remains somewhere: in the heart of the one listening, in space or in the ground, it stays and has some result. Moreover, by learning to be thoughtful one develops dignity in one's nature. The more one thinks of others the more dignified one becomes, because dignity springs from thoughtfulness.