But what if an artefact helped you - what if it stung you into facing the awesome Reality of the Incarnation?
Now this tablecloth is not a good example of what I mean - the Shroud would be better. Or the Ark of the Covenant.
But here’s a secular, neutral example.
That photo of a loved one in your wallet or on your phone. Why do you carry it?
Answer: so that in the busy day you can be recollected to your wife, your daughter, your son. You glance at the photo and reconnect with them in love.
A relic that recollects you to God - that by its nature directs and recollects you towards Him. How is that not good and useful?
If someone need something to "connect" with God with, He tells us to meditate on His word. So to help them through the day, might I suggest putting Bible memory verses in their wallet.
Psa_119:11 I have stored up your word in my heart, that I might not sin against you.