It seems entirely possible to be both irreligious and spiritual. To have little-to-nothing to do with organized religious activity and, yet, suspect there may be something outside (or inside) the physical world.
There is a curious word in the Old Testament which appears only six time (I’m working from memory), pleroma, which is habitually translated as fullness. From another point of view, pleroma has a significantly different meaning: Gnostics understand it as the barrier or boundary between this world and the homecoming we hope to achieve. Gnosticism holds a different, simpler template for us to achieve that homecoming, one which I find hopeful for us all. For the curious, I’ll try to explain my understanding of the task at hand.
In the end which may be closer than I imagine, my current choice of epitaph is this: “Better luck next time.”