I could not get out of my mind the thought of a friend, who said that the rainbows over the Falls were like the arts and beauty and goodness, with regard to the stream of life-caused by it, thrown upon its spray, but unable to stay or direct or affect it. and ceasing when it ceased. In all comparisons that rise in the heart, the river, with its multitudinous waves and its single current likens itself to a life, whether of an individual or of a community. A man's life is of majiy flashing moments, and yet one stream; a nation's flows through all its citizens, and yet is more than they. In such places, one is aware, with an almost insupportable and yet comforting certitude, that both men and nations are hurried onwards to their ruin or ending as inevitably as this dark flood. Choose the meaning of the word inevitably

Inevitably means something that is certain to happen and cannot be avoided or prevented.