The diamond is the hardest of all our known metals. Nothing in the world is harder than diamond. He passes it and cuts the glass into two pieces. This pen has a piece of diamond in it. This is possible because a diamond is a very hard object, whether natural or synthetic. Unlike all other minerals, diamonds are not affected by any acid. If you put a diamond in any acid, it will remain the same, but if the hardest diamond is heated in the presence of air, it will evaporate into a colorless gas and this gas will be carbon dioxide. There is a "break" of things if you face a problem where it is at its worst. Your attempt may not be successful but your effort from another place may be extremely fruitful. Whenever you face a challenge, first find out what its weak point is and start your struggle from what is its weak point. One thing can be invincible in some respects but the same. Things will prove to be wax for you in other respects. You can make a person whom you cannot agree with bitter words agree with you with sweet words. You can suppress your opponent with morals and nobility that you have not been able to suppress through battle. In an environment where you can't get your place through demand and protest, you can get your place through hard work and talent. Diamond is hard for acid but it becomes soft for heat. The same is true of man. If a man looks hard in one sense, don't think of him as hard forever. If he is hard in one sense, he can be soft in another. A person seems inflexible in dealing one way but agrees on all conditions in dealing the other way. This is the truth that is the secret of all kinds of success of life.