Detaching and Emptying
The old mystics used to teach what they call "detachment," meaning the cutting loose of the soul from all that could hold it back from God. This need for detachment is the secret of much of our instability. We cannot follow the Lord fully so long as we are tied fast to anything else, any more than a boat can sail out into the boundless ocean so long as it is tied fast to the shore.
If we want to reach the "city which hath sure and steadfast foundations" (Heb. 1:10, para), we must go out like Abraham from all other cities and be detached from every earthly attachment. Everything in Abraham's life that could be shaken was shaken. He was, as it were, emptied from vessel to vessel, here today and gone tomorrow; all his resting places disturbed and no settlement or comfort anywhere. We, like Abraham, are looking for a city with foundations, whose builder and maker is God' and therefore we too need to be emptied from vessel to vessel.
But we do not realize this, and when the overturnings and shootings come, we are in despair and think we will never reach the city that has foundations. But it is these very shakings that make it possible for us to reach it. The psalmist had learned this, and after all the shakings and emptyings of his eventful life, he cried, "In God is my salvation and my glory; the rock of my strength and my refuge is in God" (Ps. 627). At last God was everything to him; he found that God was enough. It is the same with us: when only that which cannot be shaken remains, we learn to have our expectation from Him alone.
(Quote taken from God is Enough: 365 Daily Devotions, Edited by Melvin E. Dieter and Hallie A. Dieter, Francis Asbury Press, 1986)