Real happiness lies in gratitude.
By expressing daily gratitude we will learn how to understand and deal with difficulties. It will make us pay more attention to everything that has been bestowed upon us rather than focusing on what we don't have. Happiness is a state of mind. You can be a millionaire and get anything you want in this world but still end up as unhappy. The trick of nurturing your own soul is to give thanks. The important points are to look at your past and give thanks for the many favors that Allah has already bestowed upon you.
It was narrated that Aa’ishah said: “When the Messenger of Allah (peace be upon him) prayed, he would stand for so long that his feet would become swollen. ‘Aa’ishah said: O Messenger of Allah, are you doing this when Allah has forgiven your past and future sins? He said: “O ‘Aa’ishah, should I not be a thankful slave?” Narrated by al-Bukhari (4557) and Muslim (2820).