To what extent is it correct to understand that fear and anxiety about one's deeds not being accepted contradict having a good opinion of Allah and relying upon Him, and is optimism about Paradise inconsistent with the noble verse: "And those who give what they give while their hearts are trembling because they will return to their Lord"?

The believer combines fear, hope, and love, and thinking well of Allah is a part of hope. The believer prioritizes hope and good expectations when actively engaged in worship, and prioritizes fear when falling short or committing a sin, so as to hasten to repentance. Allah described His prophets and His saints as combining fear and hope. The heart, in its journey to Allah, is like a bird; love is its head, and fear and hope are its wings. It is recommended to strengthen the wing of fear during health, and the wing of hope when death approaches, or to balance them and prioritize love. There is no harm in prioritizing love, hope, and good expectations if it is fruitful, provided that fear is not neglected when slipping or lagging behind the righteous. Believers combine fear that their deeds may not be accepted with hastening to good deeds.