Doubt about what we know

 Said the teachers of humanity.
 "Life is like solving a math problem."
 First, identify the problem as it is. Find a formula that is appropriate for solving the problem you have identified. Based on that formula, find the answer using appropriate tips.
 As anyone who is good at mathematics knows, as long as you figure the problem out properly, finding the answer is not so difficult. In other words, understanding a problem as it is is the key to solving the problem.
 Just as we must know a problem correctly in mathematics, we must be able to know what exists in life as it is. The problem is that it is so difficult to see what exists in the world as it is. It is not easy to understand exactly what is happening before our eyes as well as what we hear through any means or someone. In that sense, we should always doubt whether or not what we become to know through hearing and seeing facts is true to the facts. That is because our understanding of the facts is distorted by the colored glasses we wear.