Rumi on the beauty of spiritually intimate associations..
It is a sign of intimate friendship
when speech flows freely from the heart;
without intimacy, the flow is blocked.
When the heart has seen the sweetheart,
how can it remain bitter?
When a nightingale has seen the rose,
how can it keep from singing?
Jush-e notq az del neshân-e dustist
bastegi-ye notq az bi olfatist
Del keh delbar did kay mânad torosh
bolboli gol did kay manad khamosh
— Mathnawi VI:2638-2639
Version by Camille and Kabir Helminski
“Rumi: Jewels of Remembrance”
Threshold Books, 1996
Persian transliteration courtesy of Yahyá Monastra