What do these famous men have in common: Sigmund Freud, Jean-Paul Sartre, Bertrand Russell, Karl Marx, Pablo Picasso, and Aldous Huxley? They all declared that they did not believe in God, and all were sexually promiscuous. Coincidence?

In The Making of an Atheist, James Spiegel explains that many modern thinkers expressed doubts about God, at least in part, because it made it easier for them to continue in sin (Psalm 53:1). In an honest moment, Aldous Huxley admitted, “For myself as, no doubt, for most of my contemporaries, the philosophy of meaninglessness was essentially an instrument of liberation. . . liberation from a certain system of morality. We objected to the morality because it interfered with our sexual freedom.”

Not all doubts about God arise from sin. There are honest doubts that ambush our minds and haunt our hearts. There are distressing questions that buckle our knees in fear, and we will not rest until we solve them. But if we think about the times we struggle with doubt, it’s often when we have begun to coast in our walk with Jesus. Prayer, meditating on Scripture, and worshiping with fellow believers no longer capture our attention. We don’t consciously live repentant lives that reveal a broken and contrite heart that is truly seeking God (Psalm 51:3-5,17; 53:2). Instead, we lash out at others with corrupt values, arrogance, bitterness, and greed (Psalm 51:3,5; 53:3).

Our sin has put us at risk. God no longer seems real to us, for we have usurped His role in our lives. We’re troubled by our doubts about Him, but on one level we may be relieved. If there’s no God, then we’re free to live as we want (Psalm 53:1).

This won’t solve every kind of doubt, but the first thing to do when struggling with doubt is to search your life for unconfessed sin. Then repent (Psalm 51:7,10).

NLT 365-day reading plan passage for today: Joshua 1:1-18