'According to a Prophetic Tradition, God deals with a person based on his conjecture for God. Is this true?'  Summary:  - This is only true for those who have befriended God, not a common person who only reads about God in the celestial books. It is only after you meet God and communicate with God that you develop a conjecture for him.   - A conjecture is a careful calculation of your characteristics and habits. A person develops a conjecture for God based on how God has dealt with him in the past.   - If God has continually blessed you and been merciful upon you, you will develop a conjecture that God will always be this way with you. This is when the Prophetic Tradition mentioned in the question applies.