How can you know something that cannot be concretely proven?
Well, at least in one sense, you can’t. You can only observe the evidence at hand.
Let’s take a look at 1 Thessalonians 1.4-5a and the idea of the preponderance of evidence.
A real life faith is seen in the preponderance of evidence.
Father, remind us of the evidence of Your working to draw us, convince us, and convict us of our need for the new life only You can give.