Taking a leap of faith option is probably the most common and orthodox solution. While religious themes comes to mind, it's not really limited to religion, tons of people find non-religious causes and beliefs to hold onto, like humanism, skepticism, trans-humanism, social justice, or other variants.

Common to all of these is a specific narrative, a foundational belief that deep down, once you wash away the topsoil, it all makes sense, that there is an unshakeable and unmovable bedrock waiting. Sure, there is sand and water shaking our feet today, but deep below awaits solidity and surety. That ultimately, Truth is our steadfast ally. And that the only real way to find meaning and sanity is to root yourself to that bedrock.

But what happens that day when we dig down and find nothing? When we realize that we are floating aimlessly in space towards nowhere, untethered from all meaning? If we have tied all our worth, thoughts, and values to that imaginary rock then we'll have nothing left.