Allah words to take away our sadness and bring us the happiness

• Don't regret too much, don't cry too much and don't be discontent

 لِّكَيۡلَا تَأۡسَوۡاْ عَلَىٰ مَا فَاتَكُمۡ وَلَا تَفۡرَحُواْ بِمَآ ءَاتَٮٰڪُمۡ‌ۗ وَٱللَّهُ لَا يُحِبُّ كُلَّ مُخۡتَالٍ۬ فَخُورٍ ( ٢٣ 

in order that you may not be sad over matters that u fail  to get, nor rejoice because of that which has been given to you, and Allah likes not prideful booster.( alHadeed : 23)

• Allah only is enough, He can guide us, take care of us and protect us so don't be afraid.

يَـٰٓأَيُّہَا ٱلنَّبِىُّ حَسۡبُكَ ٱللَّهُ وَمَنِ ٱتَّبَعَكَ مِنَ ٱلۡمُؤۡمِنِينَ (٦٤

O Prophet! Allah is Sufficient for the believers who you. (al-Anfal:64)

• Only Allah keeps us away from the enemies, recover us from disaster and sickness and protect us from harm and damage.

إِنَّ ٱللَّهَ مَعَ ٱلَّذِينَ ٱتَّقَواْ وَّٱلَّذِينَ هُم مُّحۡسِنُونَ (١٢٨)

Truly Allah is with those who fear Him (keep their duty unto Him) and those good people. (an-Nahl:128)

• God can watch us, hear our speech, support us against the enemies, help us over our severity and delete our burden.

إِلَّا تَنصُرُوهُ فَقَدۡ نَصَرَهُ ٱللَّهُ إِذۡ أَخۡرَجَهُ ٱلَّذِينَ ڪَفَرُواْ ثَانِىَ ٱثۡنَيۡنِ إِذۡ هُمَا فِى ٱلۡغَارِ إِذۡ يَقُولُ لِصَـٰحِبِهِۦ لَا تَحۡزَنۡ إِنَّ ٱللَّهَ مَعَنَا‌ۖ فَأَنزَلَ ٱللَّهُ سَڪِينَتَهُ ۥ عَلَيۡهِ وَأَيَّدَهُ ۥ بِجُنُودٍ۬ لَّمۡ تَرَوۡهَا وَجَعَلَ ڪَلِمَةَ ٱلَّذِينَ ڪَفَرُواْ ٱلسُّفۡلَىٰ‌ۗ وَڪَلِمَةُ ٱللَّهِ هِىَ ٱلۡعُلۡيَا‌ۗ وَٱللَّهُ عَزِيزٌ حَكِيمٌ (٤٠

If ye help him not, still Allah helped him when those who disbelieve drove him forth, the second of two; when they two were in the cave, when he said unto his comrade: Grieve not. Lo! Allah is with us. Then Allah caused His peace of reassurance to descend upon him and supported him with hosts ye cannot see, and made the word of those who disbelieved the nethermost, while Allah's Word it was that became the uppermost. Allah is Mighty, Wise.  (at-Tawbah:40)

• Didn't God make your chest (Muhammad saw) wide, cheerful, delightful, peaceful, comfortable, happy and inhabited.

بِسۡمِ ٱللهِ ٱلرَّحۡمَـٰنِ ٱلرَّحِيمِ

أَلَمۡ نَشۡرَحۡ لَكَ صَدۡرَكَ (١) وَوَضَعۡنَا عَنكَ وِزۡرَكَ (٢) ٱلَّذِىٓ أَنقَضَ ظَهۡرَكَ (٣) وَرَفَعۡنَا لَكَ ذِكۡرَكَ (٤) فَإِنَّ مَعَ ٱلۡعُسۡرِ يُسۡرًا (٥) إِنَّ مَعَ ٱلۡعُسۡرِ يُسۡرً۬ا (٦) فَإِذَا فَرَغۡتَ فَٱنصَبۡ (٧) وَإِلَىٰ رَبِّكَ فَٱرۡغَب (٨)

In the name of Allah, the Beneficent, the Merciful

Have We not caused thy bosom to dilate, (1) And eased thee of the burden (2) Which weighed down thy back; (3) And exalted thy fame? (4) But lo! with hardship goeth ease, (5) Lo! with hardship goeth ease; (6) So when thou art relieved, still toil (7) And strive to please thy Lord. (8) (ass-Sharh )

• God can forgive the guilty, accept the repentant, erase obstacles, remove mistakes and hide sins.

ٱلَّذِينَ يَجۡتَنِبُونَ كَبَـٰٓٮِٕرَ ٱلۡإِثۡمِ وَٱلۡفَوَٲحِشَ إِلَّا ٱللَّمَمَ‌ۚ إِنَّ رَبَّكَ وَٲسِعُ ٱلۡمَغۡفِرَةِ‌ۚ هُوَ أَعۡلَمُ بِكُمۡ إِذۡ أَنشَأَكُم مِّنَ ٱلۡأَرۡضِ وَإِذۡ أَنتُمۡ أَجِنَّةٌ۬ فِى بُطُونِ أُمَّهَـٰتِكُمۡ‌ۖ فَلَا تُزَكُّوٓاْ أَنفُسَكُمۡ‌ۖ هُوَ أَعۡلَمُ بِمَنِ ٱتَّقَىٰٓ (٣٢

Those who avoid enormities of sin and abominations, save the unwilled offences - (for them) lo! thy Lord is of vast mercy. He is best aware of you (from the time) when He created you from the earth, and when ye were hidden in the bellies of your mothers. Therefor ascribe not purity unto yourselves. He is best aware of him who wardeth off (evil). (an-Najm:32)

• His relief is nearby, His kindness is urgent,His ease is happening, His generousity is wide and his grace is general.

يَـٰبَنِىَّ ٱذۡهَبُواْ فَتَحَسَّسُواْ مِن يُوسُفَ وَأَخِيهِ وَلَا تَاْيۡـَٔسُواْ مِن رَّوۡحِ ٱللَّهِ‌ۖ إِنَّهُ ۥ لَا يَاْيۡـَٔسُ مِن رَّوۡحِ ٱللَّهِ إِلَّا ٱلۡقَوۡمُ ٱلۡكَـٰفِرُونَ (٨٧

Go, O my sons, and ascertain concerning Joseph and his brother, and despair not of the Spirit of Allah. Lo! none despaireth of the Spirit of Allah save disbelieving folk. (yusuf:87)

أَلَمۡ نَشۡرَحۡ لَكَ صَدۡرَكَ (١) وَوَضَعۡنَا عَنكَ وِزۡرَكَ (٢) ٱلَّذِىٓ أَنقَضَ ظَهۡرَكَ (٣) وَرَفَعۡنَا لَكَ ذِكۡرَكَ (٤) فَإِنَّ مَعَ ٱلۡعُسۡرِ يُسۡرًا (٥) إِنَّ مَعَ ٱلۡعُسۡرِ يُسۡرً۬ا (٦) فَإِذَا فَرَغۡتَ فَٱنصَبۡ (٧) وَإِلَىٰ رَبِّكَ فَٱرۡغَب (٨)