The way of trust is a movement into obscurity, into the undefined, into ambiguity, not into some predetermined, clearly delineated plan for the future. The next step discloses itself only out of a discernment of God acting in the desert of the present moment. The reality of naked trust is the life of the pilgrim who leaves what is nailed down, obvious, and secure, and walks into the unknown without any rational explanation to justify the decision or guarantee the future. Why? Because God has signaled the movement and offered it his presence and his promise.
Ruthless trust is an unerring sense, way deep down, that beneath the surface agitation, boredom, and insecurity of life, it's gonna be all right. Ill winds may blow, more character defects may surface, sickness may visit, and friends will surely die; but a stubborn, irrefutable certainty persists that God is with us and loves us in our struggle to be faithful.
Brennan Manning, from Ruthless Trust: The Ragamuffin's Path to God