Earthly treasures soon fade, but a treasure in heaven lasts for ever. By this treasure Jesus does not mean the one great treasure of himself, but treasures  in the literal sense of the word, treasures accumulated by the disciples for themselves. What a wonderful promise we have here: as we follow Jesus, we win heavenly treasures which are incorruptible; they are waiting for us, and one day we shall enjoy them as our own. Surely these treasures can be none other than the “extraordinary,” the hidden character of the Christian life, none other than the fruits of the passion of Jesus Christ which sustains the lives of his followers.

Dietrich BonhoefferThe Cost of Discipleship1961 ed., 195.