Greetings @haffizullah,

I agree with what you tell. The size of the achievements does not always determine happiness, this depends to a greater extent on your mental state.

In this sense, we must take care of our mind, as well as the body, it is what it eats, the mind is what you give it to perceive. Give him good things and you will have a healthy mind. Surely, you will be happier and your achievements will be focused