The Prophet ﷺ said, “Indeed with greater trials come greater rewards. Indeed, when Allah loves a people, He tests them. Whoever is content will attain Allah’s pleasure, and whoever is angry with attain Allah’s wrath.” (Tirmidhi)
ibn al-qayyim said, “sadness weakens the heart and diminishes determination and wanting to go forward. and there is nothing more beloved to shaytan than the sadness of a believer.”