Faith cannot be acquired by a decision of the will: it is a gift from God. Yet it can be given to everyone who seeks it. As Jesus says, “Seek, and ye shall find.” What counts here is trust. Faith is not dependent on reason – on theories, theological systems, or other intellectual explanations. It is belief, precisely in the absence of these things. Mary had reason enough to doubt the angel who came to her from God, but instead she believed – “Here am I, a handmaiden of the Lord” – and received the Word in her heart. It can be that simple!
Source: Freedom from Sinful Thoughts