“God is knowable by human reason. And yet, the miracle is absolutely necessary, not only because it is needed in apologetics, but also for the joy it brings to our hearts: the heart cannot find complete rest in a God whom it does not feel to be stronger than anything that exists. How are we to succeed in apprehending the presence of the divine current beneath the continuous web of phenomena—the creative transcendence through evolutive immanence?”
Teilhard de Chardin, Pierre (2002-11-18). Christianity and Evolution (Harvest Book, Hb 276) (Kindle Locations 324-328). Houghton Mifflin Harcourt. Kindle Edition.
Teilhard de Chardin 
Nice!
“God is knowable by human reason.” Indeed I am. Had I not made Myself the Mind to know Myself, I would never have made My Mind.
We can certainly “know” God with head knowledge but when God transcends the everyday and speaks to each of us in different ways, then we truly “know” God in our heart of hearts and that is transformational.