It is sometimes of God's mercy that men in the eager pursuit of worldly aggrandizement are baffled; for they are very like a train going down an inclined plane - putting on the brake is not pleasant, but it keeps the car on the track.
"Life Thoughts, Gathered from the Extemporaneous Discourses of Henry Ward Beecher, by One of His Congregation". Book edited by Edna Dean Proctor, 1859.