John 10:9
I am the door; if anyone enters through Me, he WILL be saved, and WILL go in and out and find pasture.
At some time in your life you have relied on a system of perception called faith.
You may say, "I am a rationalist; I am a empiricists."
But you did not begin discovering the world through reason or experience.
You began as a child using faith as your basic system of perception.
You were told the sky is blue, the grass is green.
A dog was a dog and a cat was a cat, because someone identified them for you.
You accepted facts on faith.
This is the way EVERYONE begins the learning process, since faith is the basic system of perception.
Even though Christ has opened the door, we may choose to walk through.
Walking away from sin in our lives takes an act of positive volition on our part.
We leave our own decisions.
That is why the Scripture says "believe."
Salvation has been freely provided by Jesus Christ, but we must accept it by faith alone.
John 1:12
But as many as received Him, to them He gave the right to become children of God, even to those who believe in His name.