Classic Poem

If this indeed be love, when all desire
And every wish and every sense and thought,
And all that eyes have seen or life has taught,
Are fuel all to one consuming fire:
When earthly passion rising from the mire,
And ecstasy come down from heaven on high,
And mortal things, and things that may not die,
Like blended voices in an angel choir
In one concentrate harmony unite:
If this be love, this fiery force which springs
From earth, and rises heavenward pure and bright,
Immortal longing for immortal things;
If this be love, can love, if love it be,
Do any harm, dear friend, in loving thee?