"The wrath of God is being revealed from heaven against all the godlessness and wickedness of men who suppress the truth by their wickedness, since what may be known about God is plain to them, because God has made it plain to them. For since the creation of the world God's invisible qualities—his eternal power and divine nature—have been clearly seen, being understood from what has been made, so that men are without excuse."
Romans 1:18-20 (NIV)
In this passage, we are informed that we can know what God is like through the things he has made. Not only can we discover those touchy-feely attributes that give us warm fuzzies: God is a gracious provider, a wondrous artist, and a master engineer, but we also discover those scary attributes: God is not like us, he is willing to keep us at arm's length, his anger brings dire consequences. Some may ask, "how can you learn of those scary things just from the creation?" To which I would answer, "look at life."
What about our existence doesn't reveal that God takes exception to the human race? Disease wracks the rich and poor, the just and the unjust, virtually everyone indiscriminantly. God certainly has the power to do life differently, but it is what it is, and it tells us something. Good people, nice people, even godly people drown in floods, are crushed in landslides, or dragged out to sea, or are tossed like ragdolls in the wind. How could anyone think that a God who allows all of that in life would promise anything better after death? For all anyone knows, it could well be worse!
And then there is death itself. Everything dies, not only the living, but stuff too, it's called entropy. We can remain indifferent to God, never pursuing the knowledge of him, or more importantly, a friendship with him. We can remain at arm's length throughout our lives, such as they are, but what do those lives as we live them portend? The wrath of God is being revealed from heaven, but what is it SCREAMING AT US IN BOLD CAPITALS? I hope it's telling you to flee the fullness of that wrath which is yet to come. I hope it's telling you there is a hell (and it needs to be avoided).