Knowing or believing?

Does a person ever fully know? Words like Faith and Hope I think, are more tangible and more honest words than knowing.

I came closest to "knowing", if you will, the day I received the sacrament of confirmation, as my intellect joined with both my heart and my hope and narrowed my trajectory to the one I continue on today.

But I still don't call it knowing - knowing is looking at a half full glass and seeing water and emptiness. Believing is looking at a half full glass of water, and seeing the liquid portion that is visible, and trusting in the gaseous portion that is invisible.