Ibnul Qayyim رحمه الله said the word (الحزن) – (sadness) does not appear in the Qur’aan except in the form of forbidding it
(ولا تهنو ولاتحزنوا)
or in the form of negating it
(فلاخوف عليهم ولا هم يحزنون).
And the reason for this is because there is no benefit for having sadness in the heart. The most beloved thing to shaitan is to make the believing slave sad by taking him off track.
The Prophet (ﷺ) sought refuge in Allah (سبحانه وتعالى) from sadness
(اللهم إني أعوذ بك من الهم والحزن)
?Ibnul Qayyim رحمه الله said: “Sadness weakens the heart and diminishes determination and wanting to go forward. And there is nothing more beloved to the shaitan than the sadness of a believer.”
For this reason, be happy, optimistic and think good about Allah (سبحانه وتعالى). Have trust in what Allah (سبحانه وتعالى) is able to do and depend on Him. You will find happiness and pleasure in all situations.
?Ibnul Qayyim رحمه الله said: “Don’t ruin your happiness with worry, and don’t ruin your mind with pessimism. Don’t ruin your success with deception and don’t ruin the optimism of others by destroying it. Don’t ruin your day by looking back at yesterday.
If you think about your situation, you will find that Allah (سبحانه وتعالى) has given you things without asking, so have trust in Allah ( سبحانه وتعالى) that He doesn’t prevent anything you want except there is goodness for you.
You could be sleeping and the doors of the heavens are being opened with dua’as being made on your behalf, subhan Allah: perhaps from someone poor whom you helped, or someone sad whom you brought joy, or someone passing by and you smiled at him, or someone in distress and you removed it.. so don’t ever underestimate any good deeds.”
?One of the righteous predecessors said:
” I make dua’a to Allah (سبحانه وتعالى) for something I want, and if He gives it to me then I’m happy once and if He doesn’t give it to me then I’m happy ten times because the first was my choice and the second was Allah’s choice.”
?As Sa’ady (رحمه الله) on him said: “Life is short so don’t shorten it with worries, grief, and sadness.”
So be the owner of a heart that breathes happiness and satisfaction.