Shaykh Muqbil Al-Wādi’ī [رحمه الله] said:

❝If you were strong in Aqīdah [holding on to the correct beliefs of Islām], both Jinns and devils would be afraid of you, [but] if you were shaky in Aqīdah, you might well be afraid of your own shadow.❞

[Qam’u al-Mu’ānid. Dār al-Hadīth: Dammāj, (1/35) | Translated By Mikail ibn Mahboob Ariff]