To fulfill a duty, the duty must have a function. Each one must learn and follow his own function and only then will the task be a success. The mother cannot behave childish, and the child cannot dictate terms to his mother. Each one's role specifies his own functions and that must be followed with utmost sincerity. Roles cannot be switched, for the task will lack effectiveness.
If you choose God to be your teacher of life today, then God must remain teacher, and you must accept the duties of a disciple. God is here to teach, and you are here to learn and that must always remain clear. The teachings cannot be changed to suit your purposes. You must listen to God with utmost faith and act with promptness. God's guidance must be your torch to light your road. God's word must be the image of truth of your worship. God's criticism of you is only to make you alert of your faults and not to make you feel inferior.
God's encouragement of your strengths is only God's approval to strengthen them even more. Do not interpret this encouragement or praise only to reign your superiority over others. God can lead the way for you, but it is you that must follow.
Doubts will arise only in minds that are weak. You seem to think that in faith you must question. Question who, and question what, when you are unaware of them both. What questions can you ask another when your knowledge of God is so ignorant? Who else but God can answer these questions with truth, patience, and love, with no feeling of frustration, superiority or being humiliated?
You have grown so accustomed to life without God, that the possibility of the change of life with God, fills you with fear. Yes, it is only your fear that takes form of doubts. If you must fear, then fear your present moment that passes you by God, fear your futures,