We must be ready to allow ourselves to be interrupted by God. It is a strange fact that Christians and even ministers frequently consider their work so important and urgent that they will allow nothing to disturb them. They think they are doing God a service in this, but actually they are disdaining God’s “crooked yet straight path” (Gottfried Arnold). But 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.
Dietrich Bonhoeffer, Life Together