If a house has no garden, the whole earth becomes its garden!

Do you want your name to live forever? You fool! Forget your name, try to save yourself! What use there is for you, if your name lives and you die? You fool!

Man! What are you? Who are you? Just a shadow in this universe! You always forget this and the truth will always remind you what you really are! Do you want to be a real thing, not just a shadow? Improve your science ten thousand times; improve your science hundred thousand times! If you can't improve your science, you will remain as a miserable shadow!

Hard roads are not opened by themselves; they are opened by some brave people!

The scent of the morning is prepared by the night; the scent of the night is prepared by the day; everything helps everything!

It is perfectly possible that a grandfather can have a more scientific mind than his grandchildren! Societies do not always go forward! Sometimes old generations are much luckier!

Quotations are the gold mine of human mind, the silver pearls of the wisdom ocean, and the cool drops of the rain of intelligence.