Abū Ḥāmid Muḥammad ibn Muḥammad al-Ghazālī, 11th-12th century Persian mystic Islamic philosopher and theologian on the emotional communicatory power of sound.
Many a cooing pigeon in the early dawn, full of disquietude, has cried among the swaying branches;
She remembered a mate and a time of happiness, and she wept for sorrow and she aroused my sorrow.
So my weeping often disquieted her and her weeping often disquieted me.
And, in truth, I would sometimes soothe her yet not make her understand, and she would sometimes complain yet not make me understand;
But I, through emotion, made her perceive, and she also, through emotion, made me perceive.
From his chapter on Music and singing in Ihya ‘Ulum ad-Din (“The Revival of the Religious Sciences”). Translation to English by Duncan B. Macdonald