The Bible says God is very angry with all who aren’t believing on Christ (Jn 3:36), and that Christ Himself is angry with all who aren’t worshipping Him. (Ps 2:12). How do we flee from the wrath of God and of His Son? (Lk 3:7)
Whether one believes in God or not, the possibility God might exist and that He might be angry ought to be sobering. (Ac 17:30) If God might exist it is rational to act as if He might, and if He might be angry then acting accordingly is likewise rational.
This follows from Pacal’s Wager: given the remotest prospect (any non-zero probability) of suffering the infinite fury of an angry God, the expected loss of neglecting to avoid it is infinite. (2Co 5:11) What does this look like in practical terms?
We might try to flee from God, but how does one flee Omnipresence? Presuming there’s a place where God is not is foolish at best. (Ac 17:28)
The only rational response is to order our lives to please God as well as we can (i.e. repent) (Lk 3:8-9) and search for a way to be reconciled with Him. No other path is acceptable. (Ro 1:18-19)
Once we start looking in earnest for evidence of God and of His ways, it’s not so difficult to find. Irreducible Complexity in Nature becomes sufficient proof of God’s existence, power and wisdom: only those blindly presuming Philosophical Materialism as a faith-axiom can miss this. (Ro 1:20)
Acting as if God exists also implies giving Him the benefit of the doubt regarding His nature: acting as if God is good – that He’s both loving and just. For if God is not good there’s no rational way to minimize our expected loss (i.e. all bets are off). Presuming God is good is rational since this minimizes the likelihood of offending Him.
Following this reasoning, seeking reconciliation with God is also straightforward: only Christianity portrays God as both just and loving; all other religions both downplay the potential of human sinfulness and offer reconciliation with divinity apart from justice, as if repentance and personal merit can somehow atone for eternal sin — all the while rejecting this concept in all of our civil institutions: no one really believes proper order can exist in the universe without justice.
And no other religion addresses how any sin against an infinitely good and holy God can be less than infinite … or justly atoned for without paying an infinite penalty. Christianity offers us both.
As we earnestly seek, we find we’re all guilty before God: He is justly angry with us for our sin and will punish us eternally unless we flee to His Son as our propitiation (1Jn 2:2), God Himself suffering the infinite penalty for our sin (1Jn 3:16), and hide ourselves in Him. (Ps 119:114) This is the only way to flee from the wrath to come.