“The second service that one should perform for another in a Christian community is that of active helpfulness. This means, initially, simple assistance in trifling, external matters. … Nobody is too good for the meanest service. … We must be ready to allow ourselves to be interrupted by God. God will be constantly crossing our paths and canceling our plans by sending us people with claims and petitions. … it is part of the discipline of humility that we must not spare our hand where it can perform a service and that we do not assume that our schedule is our own to manage, but allow it to be arranged by God.”
Life Together by Dietrich Bonhoeffer (Harper & Row, 1954), p.99.