I have said that Abraham possessed nothing. Yet was not this poor man rich? Everything he had owned before was his still to enjoy: sheep, camels, herds, and goods of every sort. He had also his wife and his friends, and best of all he had his son Isaac safe by his side. He had everything, but he possessed nothing. There is the spiritual secret. There is the sweet theology of the heart which can be learned only in the school of renunciation
Pursuit of God, AW Tozer, Location 243