The above sentence comes from the famous sayings of the British Romantic poet Shelley, not from the poetry.
The original English text is:
Love is like a lamp, and at the same time illuminate two people. It never diminishes.
Shelley's most famous short love poem is Love's Philosophy ( The philosophy of love):
The fountains mingle with the river
And the rivers with the ocean,
The winds of heaven mix for ever
With a sweet emotion;
Nothing in the world is single;
All things by a law divine
In one another's being mingle—
p>Why not I with thine?
See the mountains kiss high heaven
And the waves clasp one another;
No sister-flower would be forgiven
If it disdain'd its brother;
And the sunlight clasps the earth
And the moonbeams kiss the sea
What are all these kissings worth—
If thou kiss not me?