“Daring greatly’ requires nothing less than a cleansing of the heart—or what the Desert Elders called ‘purity of heart.’ My best stab at what they meant by this is what I call wholeheartedness. This means we are ‘all in.’ We no longer hold anything back. We can contrast ‘all in’ with ‘half-hearted.’ Purity of heart is unwavering commitment and resolve, void of duplicity.”