The most important means of happiness and the foundation of all felicity is to have sound belief and perform righteous deeds.
It isn’t what you have, or who you are, or where you are that makes you happy or unhappy . It is what you think about, what goals you set and what you intend for.
Allaah The Almighty Says (what means):
“Whoever works righteousness (whether male or female) while he (or she) is a true believer (of Islaamic Monotheism) verily, to him We will give a good life (in this world with respect, contentment and lawful provision), and We shall pay them certainly a reward in proportion to the best of what they used to do (i.e. Paradise in the Hereafter).” [Quran,16: 97]
Allaah The Almighty promises whoever possesses sound belief and performs righteous deeds that he will have a happy life and will also be rewarded in the eternal Hereafter. The reason for this is obvious: those who have the correct belief which leads to righteous deeds, reformed hearts and refined manners have the basic foundation that they can refer to in any event – regardless of whether these are matters which cause joy and happiness or sorrow and dejection.
People often feel like they need certain things in their lives in order to be happy. Those thoughts are products of your own imagination and, at the end of the day, are just excuses or places to put the blame. Your Happiness is always dependent on you. You don’t need a big house, a partner, material things, or anything else, all you need is sound belief and a pious heart.
The Prophet described this quality of the true believers when He said:
“How wonderful is the affair of the believer! All of his affairs are good and this is the case for nobody except a believer. If he is blessed with prosperity he thanks (Allaah) and that is good for him; and if he is afflicted with adversity he perseveres and that is also good for him.” [Muslim]
The Prophet informed us that a believer’s reward would be multiplied many times over, regardless of whether what befalls him brings him joy or sorrow.