The acts of the heart and the divine uniqueness according to Ibrahim al-Qaysi:

What are called, in the Muslim tradition, acts of the heart are: sincerity, hope, fear, love, trust, patience, thanks, praise. These acts are actually very much related to divine uniqueness. If these acts are defective, the divine uniqueness, whose purity we must preserve, will be affected. The content of the epistle, which we present to you, makes it possible to guard against any defect at the level of divine uniqueness.

The author reveals to us the acts of the heart in all their details:

• Sincerity.
• Love for Allah.
• The thanks.
• Jealousy and anger for Allah.
• Patience.