Who cares if it's unbiblical when we're using analogies? Parachutes aren't biblical either, so why are you just now complaining?
As far as the nonsense part, the Bible says one must believe the gospel message to be saved. To use an analogy, when someone believes the gospel message it's like putting a battery into a device.
When people are conceived in their mother's womb, they are alive to God. After they're born, and grown a little, they reach a point in their life where they know what is right and wrong, and they have the opportunity to choose between the two, but instead of doing right, they choose to sin, and because they did, sin revives in them (whereas before sin was dead because of Christ's sacrifice), and they die to God.
To use my analogy, they are born with the battery plugged in, then they come to the point where they have a choice to either leave the battery in, or unplug it. When they unplug it, they die.
However, when the person hears the gospel message, they have the option to accept it and believe or reject it and perish, and if they choose to believe it, they are again made alive to God.
Analogy: hearing the gospel is like giving the person's capacitors a charge, providing them with enough energy to either put the battery back in, or to throw it away forever. If they put the battery in, then it brings them back to life.