We use that word believe for everything and anything. But in the Bible believe means two things. It means to accept something as being true and it means to trust.
For example, of all the people who have ever crossed Niagara Falls on a tightrope the most spectacular has to be that person who was known as the great "Blondin." The first time he crossed was June 30, 1859. The next year he walked across with chains around his hands and feet so I’ve read. But the most spectacular thing of all was carrying his manager on his back across the tightrope. I am told that the great Blondin walked up to someone who had seen him do all these things and said, "Would you like me to take you across?" The man ran, leaving behind a trail of dust. Now, he may have accepted it as true that Blondin man could do it. But he did not trust him to do it. And when the Bible uses the word believe it means accept it as true that Christ died and arose and trust in Him alone, not your good works, not your church attendance, not your baptism, but trust in Christ alone as your only way to heaven. It is a matter of believing. It is not a matter or behaving. Therefore, God is not asking, "How well have you behaved?"