“It is not the strength of your faith but the object of your faith that actually saves you.”
A person can strongly and sincerely believe something but that does not make what they believe in any more true or real. At one time people strongly and sincerely believed that the earth was flat. The earth did not suddenly become round when people discovered the truth.
It is the same way with salvation and God. A person can strongly and sincerely believe that there is no such thing as God, or that there are many gods, or that Jesus was a prophet but not God, or that Jesus is God, or any other variation of belief. The question is not how strong a person’s faith is in what they believe about God or how sincere they are in their belief. When it comes to salvation and God the question in one of the truthfulness of the object of your faith.
The Christian faith is built upon the proposition that not only is the God of the Bible real and salvation is offered only through faith in the very real person and work of Jesus Christ, but the facts of the faith can withstand and even welcomes scrutiny. The Christian faith is not one of trying really hard to believe what you know is not true, but a faith that is secure because of the truth and facts backing the object of the faith – Jesus Christ.