Boast not thyself, Niagara,
That thy deep song shall ne'er be o'er ―
The archangel's voice shall yet proclaim
That thou and time shall be no more.
Boast not thyself, though God hath set
His seal of glory on thee now;
For He shall veil thy glory yet,
And take the rainbow from thy brow.
Thou, thou may'st sing a requiem o'er
The grave of millions yet unborn;
Thy sun of glory too shall set ―
The universe for thee shall mourn.