Shaykh al-Islām, the preeminent scholar of his age, Abū al-‘Abbās Ahmad ibn Taymiyyah—may Allah sanctify his soul and illuminate his grave—said:
All praise belongs to Allah. We praise Him, seek His help, guidance, and forgiveness, and seek refuge in Allah from the evils within ourselves and from our misdeeds. Whomever Allah guides, none can lead astray; and whomever He leads astray, none can guide. I bear witness that there is no god worthy of worship except Allah alone, without partner, and I bear witness that Muhammad is His servant and Messenger. May Allah bestow abundant blessings and peace upon him.
Shaykh Abū Muhammad ‘Abd al-Qādir said in the book Futūh al-Ghayb (Revelations of the Unseen):
“In all his circumstances, every believer must observe three things: a command to obey, a prohibition to heed, and a divine decree to accept with contentment.