While the bible states that the gate to eternal life is narrow, it doesn’t mean that it is impossible to pass through that way. It means there’s only one way in. The gate, or the way, is Jesus Christ. He is the way to the Father.
Matthew 7:13-14 — Enter by the narrow gate; for wide is the gate and broad is the way that leads to destruction, and there are many who go in by it. Because narrow is the gate and difficult is the way which leads to life, and there are few who find it.
John 10:9 — I am the door. If anyone enters by Me, he will be saved, and will go in and out and find pasture.
Luke 13:24 — Strive to enter through the narrow gate, for many, I say to you, will seek to enter and will not be able.
John 14:6 — Jesus said to him, “I am the way, the truth, and the life. No one comes to the Father except through Me.