The Christian ideal - have we really tried it?

Something to painfully ponder: "The Christian ideal has not been tried and found wanting. It has been found difficult; and left untried." Quote from Gilbert K. Chesterton, prominent Catholic author, philosopher, apologist, and literary writer.

Although I'm familiar with Chesterton, I encountered this quote only a few minutes ago when leadership guru and avowed Christian Chris Brady tweeted it. 

I tweeted back - that we can write entire essays on this quote alone.  And becauseI'm wordless at the moment, in grappling with the significance of this quotation (like what exactly is the Christian ideal and why it's so difficult and are we actually living it), I'll just post the photos of famous folks who would probably best embody irrefutable examples of the Christian ideal: Mother Teresa, who needs no introduction, and A.W. Tozer, the so-called Christian mystic whose books like The Pursuit of God and The Knowledge of the Holy brought millions of modern believers into a deeper walk with God, one that is more experiental and yet in accordance with Scripture.