Abu Hurairah narrated that the Messenger of Allah ﷺ said: "Indeed, having good thoughts concerning Allah is from the perfection of the worship of Allah".
This hadith also teaches us that having good thoughts about Allah is an essential part of perfecting our worship to Him. We must strive to always think positively about God so that our actions are based on faith rather than fear or doubt. By doing this we can ensure that our worship is pleasing to God and beneficial for ourselves as well as those around us.