Allah ﷻ says in His Book:

وَمَا خَلَقْتُ الْجِنَّ وَالْإِنسَ إِلَّا لِيَعْبُدُونِ
“I did not create jinn and humans except to worship Me.”
— [Surah adh-Dhariyat, 51:56]

Allah, the Glorious, created everything for His worship — that is, to love Him, to humble oneself before Him, and to obey Him. This is the truth for which the heavens and the earth were created. He did not create them in vain, nor has He left humankind neglected and without purpose.

He, the Most High, loves to be worshipped and obeyed. Had His servants not loved Him, obeyed Him, or called upon Him, He would not have cared for them.

When a servant turns away from the purpose of obedience and worship for which he was created, he deprives himself of what is most beloved to Allah. He abandons the very goal of his existence, becoming as though he were created in vain. His harvest yields not fruit, but thorns and weeds.

However, if he returns to the purpose for which he was created — to worship Allah alone — he attains the goal most beloved to his Creator. He moves from fruitlessness to fulfillment, in accordance with the wisdom of his creation. In this state, the Lord’s love for him increases, for Allah loves those who repent to Him and those who purify themselves.

It is Allah, the Most Powerful, who created His servant and bestowed countless favors upon him. He loves to grant him even more, so that the servant becomes a manifestation of His generosity. Allah wishes to see His servant grateful for His blessings, loving Him, and surrendering to Him in obedience and devotion.

He also loves that His servant dislikes and opposes His enemies, just as He loves to see him devoted to His worship and love. Such loyalty and sincerity increase Allah’s love for His servant and bring Him joy.

This explains the happiness of Allah — a reality befitting His Majesty — when His servant fulfills the ultimate purpose of servitude.

He, the Glorious, laughs out of joy when His servant rises from his bed at night to worship Him and recite His verses.

He laughs when a man, standing alone in battle against his enemy, gives his life for the love and pleasure of Allah.

He is pleased with a man who secretly gives charity to a poor person rejected by others — meeting him privately, unseen by anyone but Allah.

There is nothing inappropriate in affirming these attributes for Allah, for His happiness and laughter are unlike those of His creation.

End quote.

— Adapted from the book Tawbah: Turning to Allah in Repentance by Ibn al-Qayyim al-Jawziyyah (رحمه الله).