What is the way to remain steadfast in obedience and overcome the weakness of the self and the recurring despair regarding the heart's guidance, especially with repeated attempts and the feeling of gradually losing the sweetness of faith?

Allah the Almighty does not wrong people. He has created for them power and will by which they are held accountable. Arguing with predestination is an act of Iblis (Satan). Sincerity in seeking Allah's pleasure leads to success; for Allah the Almighty says: "And those who strive for Us - We will surely guide them to Our ways. And indeed, Allah is with the doers of good." Drawing near to Allah brings His closeness. The cunning of Satan is weak, and the believer is stronger than him through his sincerity and reliance on Allah. More resolve and sincerity are required in dealing with Allah, and anticipating the sweetness of the outcome eases the bitterness of patience. The pleasure of obedience and intimacy with Allah cannot be attained except through patience and struggle. Abandoning prayer is one of the greatest sins and gravest destructive acts. Supplication is a great means to attain what is sought, along with taking the necessary measures, such as accompanying the righteous, acquiring beneficial knowledge, and avoiding what distances one from Allah. Strive in supplication, have a good opinion of Allah, and do not despair.