Make friends with people with higher IQ than ourselves, we can learn from them the abilities we don't have and make ourselves progress; Make friends with people with lower IQ than yourself, you can see their shortcomings and prevent them before they happen. At the same time, it can help those with lower intelligence to improve and get recognition from others, and we will be happy at the same time.

Therefore, if you only make friends with people with equal intelligence, you will make less progress. At the same time, at most, everyone will get along more harmoniously. After all, opinions and ideas can overlap. Generally speaking, friends are not high or low, as long as they are sincere enough.