"Green is blue, but green is blue." From Xun Zi's "Persuade to Learn", Xun Zi uses indigo as a metaphor for a rising star who has made achievements in academics, and blue grass as a metaphor for his mentor and predecessors. I understand the true meaning of this sentence is to encourage young people to surpass their predecessors in their careers.
Human beings have developed from the ignorant age of eating animals and drinking blood to the civilized age of conquering space today. Every country has its own hero in every century. Most of them succeeded when they were young. They are young, childlike and inexperienced, but with the spirit that newborn calves are not afraid of tigers, they have surpassed the sages and staged magnificent dramas on the historical stage, which will last forever. Their students are also immortal.
Einstein, the inventor of general relativity, studied all the works of Newton, a famous physicist, as early as his student days, and absorbed the essence of classical mechanics. He has great respect for Newton, but he never trusts his predecessors. He dared to doubt and explore, and finally pointed out the mistakes of Newtonian mechanics. Yes, as some historians have said, "Einstein grew up drinking Newton's milk." He dared to challenge Newton, defeated Newton and became an idol of human progress. He is better than Ian.