Maturity is the ability to live fully and equally in multiple contexts; most especially, the ability, despite our grief and losses, to courageously inhabit the past, the present, and the future all at once.

The wisdom that comes from maturity is recognized through a disciplined refusal to choose between or isolate three powerful dynamics that form human identity: what has happened, what is happening now and what is about to occur. 

Immaturity is shown by making false choices: living only in the past, or only in the present, or only in the future, or even, living only two out of the three. 

David Whyte