✦⋆· said, "The lowest level of disbelief is when a man hears something from his fellow brother, memorizing it and desiring to expose him by it. There is no share of blessings for these people."

● "There are four pillars of disbelief: desire, fear, discontentment and anger."

✦⋆· said,"Disbelief was built on four pillars: corruption, extremism, doubt and suspicion."

✦⋆· said, "Everything that is drawn by attestation and submission is faith, and anything that is drawn by refusal and denial is disbelief."

✦⋆· said, ‘He who have doubts in Allah and His Messenger (saw) is a disbeliever."

● Imam Sadiq (as), when asked about the lowest level of atheism, said, "Arrogance is part of it."

● Imam Sadiq (as), when asked about the status of a person who lies when he speaks, who breaks promises when he makes them, and who betrays trusts when entrusted with them, replied, "These are the lowest of the states of disbelief, even though he may not be a disbeliever."