Question

I heard the Rabbi say in a few podcasts that what led you to believe was not some kind of feelings but דווקא rationality. I’d be happy to know what led the Rabbi to think that way and draw those conclusions. I looked a bit on the site and saw notebooks on matters of faith / belief—does the Rabbi explain it there? 
If there is another article that covers the topic and what leads you to believe in the Torah, I’d be glad to know—meaning, where should I start: with the notebooks or somewhere else?