Distinguishment

"We notice what we notice and make it a thing distinguishing it from what else is within our view, partly because, doubtless, it is of such or such a size and shape: but we require more impulse to the notice and distinguishment than this furnishes."

Source: wiktionary

"And first, in your doctrines of God, whom you say is to be known and believed on, as in the distinguishment of three persons...

Source: wiktionary