Little Johnny and his sister were going through a long, narrow railroad tunnel one day. The railroad company had built small clefts here and there through the tunnel, so that if any one got caught in it when the train was passing, they could save themselves.
After the little boy and girl had gone some distance in the tunnel, they heard a train coming. They were frightened at first, but the sister put her brother in one deft and then hurried for shelter in another: The train came thundering along, and as it passed, the sister cried out `Johnny, ding dose to the rock Johnny, cling dose to the rock," and they were safe.
The "Rock of Ages" may be beaten by the storms and waves of trouble, but "cling close to the rock, Christians, and all will be wet" The waves don't touch the Christian; he is sheltered by the Rock "that is higher than I," by the One who is the strong arm, and the Savior who is mighty and willing to save.