No matter how poor a person is, as long as he has knowledge and can use it, he will always become rich. In this world, money is valuable, but knowledge is priceless. Knowledge is the greatest power. As long as we exert its power, we can do anything.

Thales (about 624 BC-about 547 BC), a famous scientist, philosopher and politician in ancient Greece, was born in an aristocratic family that ruled Miletus, with high political status and rich family.

In order to seek knowledge, he traveled and studied in Egypt in the east, and continued to learn scientific knowledge after returning. In this way, he inherited little money.

One night, Thales walked on his back to a square. He is observing the stars in the sky wholeheartedly. He didn't notice that there was a pit ahead. When he slipped, his whole body sank in.

A businessman came up and sneered, "You claim to know things in the sky, but you don't know things under your feet. You have benefited a lot from learning knowledge. Falling into the pit is the benefit of your knowledge! "

Thales climbed out of the pit and calmly replied, "Only those who stand tall have the right and freedom to fall into the into the pit from a height. An ignorant person like you can't enjoy this kind of right and freedom. A man without knowledge is like lying in a pit, and he can never climb out. How did he fall into the pit from above? " His witty retort bored the businessman.

However, the businessman didn't want to give up and continued to dig at Thales: "But what can your profound knowledge bring you?" Gold or bread? "

Thales said, "We'll see!" He used a wealth of scientific knowledge such as astronomy and mathematics, and after careful prediction and calculation, he came to the conclusion that next year will be a bumper year for olives. So he sold his property and rented all the olive oil presses nearby at a fairly low rent. The next year, olives really got a bumper harvest, and people competed to rent oil presses. At this time, Thales turned to rent an oil press at a high price.

One day, Thales saw that the businessman who had laughed at him also came to ask for rent, so he came forward and said, "noble rich man, did you see it?" I used my knowledge to get these oil presses. Rich people like you can only turn to me for help. However, what I am after is not money, but to prove that scientific knowledge is of great use to people's lives. Knowledge is priceless and the greatest strength! "