Donating purifies your conscience. When we donate something or money, there is a decrease in negative thoughts from our mind. By donating, positive thoughts start to grow in the mind. These positive thoughts make us happy. When negative thoughts grow in you, then the problem of stress depression and anxiety increases. It makes you sad. When positive thoughts grow inside you, you feel real happiness.
Most people of the world think that they get happiness or sorrow due to wealth. These people work hard to earn money throughout their life. Ultimately, these people devote their entire life to efforts to earn money. They keep doing good and bad works to earn money. But do they ever get real happiness because of money? No
Some people consider the relationship to be pleasant. They considers any relationship with a person of opposite gender as a happy life. Do they get real happiness? No
Be it the process of earning money or being in a relationship, you both has to work hard, but happiness is always less than your expectations. Many times you become a victim of stress and anxiety due to these reasons. Many people take steps like suicide for these reasons.