On whose authority are you commanded to believe in Christ? You are commanded to believe upon the authority of God Himself. He bids you believe in Jesus Christ, and you must not refuse to obey your Creator. You have an absolute authority for coming to Christ – the Lord Himself bids you trust Him. Charles H. Spurgeon writes:
HOW CAN WE OBTAIN an increase of faith? This is a very earnest question to many. They say they want to believe, but cannot. A great deal of nonsense is talked upon this subject. Let us be strictly practical in our dealing with it. Common sense is as much needed in religion as anywhere else. “What am I to do in order to believe?” One who was asked the best way to do a certain simple act, replied that the best way to do it was to do it at once. We waste time in discussing methods when the action is simple. The shortest way to believe is to believe. If the Holy Spirit has made you candid, you will believe as soon as truth is set before you. You will believe it because it is true. The gospel command is clear; “Believe in the Lord Jesus Christ, and thou shalt be saved.” It is idle to evade this by questions and quibbles. The order is plain; let it be obeyed.
But still, if you have difficulty, take it before God in prayer. Tell the great Father exactly what it is that puzzles you, and beg Him by His Holy Spirit to solve the question. If I cannot believe a statement in a book, I am glad to inquire of the author what he means by it; and if he is a true man his explanation will satisfy me; much more will the divine explanation of the hard points of Scripture satisfy the heart of the true seeker. The Lord is willing to make himself known; go to Him and see if it is not so. Repair at once to your closet, and cry, “O Holy Spirit, lead me into the truth! What I know not, teach Thou me.” Furthermore, if faith seems difficult, it is possible that God the Holy Spirit will enable you to believe if you hear very frequently and earnestly that which you are commanded to believe. We believe many things because we have heard them so often. Do you not find it so in common life, that if you hear a thing fifty times a day, at last you come to believe it? Some men have come to believe very unlikely statements by this process, and therefore I do not wonder that the good Spirit often blesses the method of often hearing the truth, and uses it to work faith concerning that which is to be believed. It is written, “Faith cometh by hearing”; therefore hear often. If I earnestly and attentively hear the gospel, one of these days I shall find myself believing that which I hear, through the blessed operation of the Spirit of God upon my mind. Only mind you hear the gospel, and do not distract your mind with either hearing or reading that which is designed to stagger you. (All of Faith)