In sura alZoha Allah says:

And the Hereafter shall be better for you than the world 

The world is not a place for peace and comfort, but man always faces difficulties and hardships and is involved in various issues such as illness, war or problems such as conflict with evil and wicked people, and sometimes if we have happiness in this world, it is not permanent but fleeting. But in the hereafter and in heaven, God gives the best blessings to righteous servants, which is eternal and stable.