Here’s Snodgrass (from Stories With Intent) on the parables of the Tower Builder and the Warring King (Luke 14:28-32). I find him reminiscent of Bonhoeffer.

These parables differ greatly from the easy believism that marks so much of American Christianity. Churches urge everyone to believe, to accept Jesus, but make no demands on people’s lives; the more adherents the better, even if the message is curtailed for “marketing” purposes. . . . Faith in Christ worth the name by necessity means discipleship with all its consequences.