Prove to me that you "life boat" has any more validity than Norse Mythology, Mithraism, etc.
Proof begins with whether or not you believe Jesus Christ Who claimed to be the ONLY WAY to God and salvation...was a liar and a maniac...or if He was telling the truth.
I was an atheist for many years..until once day I looked at the words of Jesus and recognized what He said was from God....that He was not deceitful madman.
It's a simple question of one or the other...and making a simple decision.
To those who accept and recognize Who Jesus is...no proof is needed. To those who reject Him, no proof will ever be enough.