You have to be content to be happy.
Happiness is the feeling of a moment of satisfaction. Material possessions do not bring happiness. Money, power, and fame are basically possessive. The more you have, the more thirsty you become and the more you want. That's why you always live with hunger. To be happy, you need to be content. A contented life is a happy life.
To be happy, you need to know your spiritual values. A person who knows spiritual values can be happy even if he has few material possessions. Because he knows how to be satisfied at the right level. A person who is satisfied with his life will live a happy life. In my 60 years of living, I have seen cases where people who do not know spiritual values become unhappy when they possess many material things. Look around you at how many people are unhappy because of excessive wealth, power and fame.
There are people who feel happy while giving. He knows that giving to others is happiness. Happiness comes out when you coexist with people. A person who only cares for himself and only takes care of his own interests cannot feel great happiness. It is because his heart is small. When you give and coexist with people, your heart grows. You can put happiness in a big way when your heart is big.
People who study are happy. If you don't study, your mind will get old quickly. Keep studying and your mind may never grow old. If you don't study when you get older, your body and mind will age quickly. If you want to be happy and mentally healthy right before you die, you have to study right before you die. People who study can live a healthy and happy life mentally.
Study when your mind is distracted and your mind is troubled. You can feel that all distractions disappear and your mind becomes at ease while studying. Think about why ancient scholars read until they died. Studying creates wisdom in your head and clears your mind of distractions.