Imam Ja‘far al-Ṣadiq (as): Imam al-Sadiq (as) said, 'Nothing exists without a limit.' I asked, 'May I be sacrificed for you, what is the limit of trust [in Allah]?' He said, 'Conviction.' I said, 'So what is the limit of conviction?' He said, 'That you do not fear anything apart from Allah.' al-Kāfī