Mystery is the heart of the universe and the God who made it

'"The spiritual life cannot be made suburban," said Howard Macy. "It is always frontier and we who live in it must accept and even rejoice that it remains untamed." The Greatest obstacle to realizing our dreams is the false self's hatred of mystery. That's a problem, you see, because mystery is essential to adventure. More than that, mystery is the heart of the universe and the God who made it. The most important aspects of any man's world - his relations with his God and with the people in his life, his calling, the spiritual battles he'll face - every one of them is fraught with mystery. But that is not a bad thing; it is a joyful, rich part of reality and essential to our soul's thirst for adventure."' As Oswald Chambers says,

Naturally, we are inclined to be so mathematical and calculating that we look upon uncertainty as a bad thing... Certainty is the mark of the common-sense life; gracious uncertainty is the mark of the spiritual life. To be certain of God means that we are uncertain in all our ways, we do not know what a day may bring forth. This is generally said with a sigh of sadness; it should rather be an expression of breathless expectation

(My Utmost for His Highest)

Wild at Heart
John Eldredge