Some things, when you have them, you should feel their preciousness and cherish them. Don't wait for time to portray it as a helpless ending before pursuing it unforgettable, because this feeling is actually sadness. What we have lost and what we cannot gain are not valuable, but what we hold tightly in our hands is the most precious. Young people do not fail. The motto of the world-famous epidemiologist Pasteur - will, work, wait - is the cornerstone of the pyramid of success. The motto of Faraday, the founder of modern electromagnetism - strive hard for success, but don't expect to succeed. The motto of Banting, the famous Canadian scientist and Nobel Prize winner in medicine - the greatest happiness in life lies not in possessing something, but in the process of pursuing something. The motto of Marx, the great teacher of proletarian revolution - think everything. The famous French writer Stendhal's motto - Anyone who writes black words on white paper should not be surprised or angry if others say he is clumsy. The famous French writer Zola's motto - There is never a day without writing a line. The motto of the famous British writer Dickens - Don't be carried away. The motto of Ye Ting, a modern Chinese proletarian writer and military strategist - The three armies can seize the commander, but the general cannot seize the ambition. The motto of the outstanding modern Chinese painter Xu Beihong - People cannot be arrogant, but they cannot be without pride. The motto of Zhu Guangqian, a famous contemporary Chinese esthetician - perseverance, tranquility, sincerity and courage. The motto of Hua Luogeng, a famous contemporary Chinese mathematician, is to say less pleasantries when meeting, and talk more about art. The motto of the famous contemporary Chinese chemist Hou Debang - Diligence can make up for one's weakness, and diligence and frugality make a career possible. Scholar Zhang Naiqi was once mistakenly classified as a "rightist". He wrote two sentences as a motto and posted them on the wall: "Practice tests the truth, and time solves problems." This was true, and he was later vindicated. The famous painter Guan Shanyue's motto is: "It is not advisable to write with only familiarity, and satisfaction is often with a third of rawness." He also engraved these two sentences on his seal. The father of the revolutionary martyr Ji Hongchang once taught him: "You are not allowed to get rich if you are an official." Ji Hongchang took this sentence as his motto. He also ordered hundreds of rice bowls from a porcelain factory and engraved this sentence on the bowls. Go up and distribute it to all soldiers. Poet and writer Qiao Yu's motto is: "Don't be confused by fashion, don't be blinded by old habits, and don't be burdened by fame." This "three no's" is not easy to do. The motto of the famous folk performing artist Luo Yusheng is: "Enjoy yourself, be good at entertaining, be content with what you have, and help others."