Mawlana Jalaluddin Rumi (1207-73) wrote about true mentors:
When you see two of them meet together as friends, they are one, and at the same time six hundred thousand. Their numbers are in the likeness of waves: the wind will have brought them into number. The Sun, which is the spirits, became separated in the windows, which are bodies. When you gaze on the Sun’s disk, it is itself one, but the one who is screened by the bodies is in some doubt. Separation is in the animal spirit, the human spirit is one essence.
Can we say this about Nezami Ganjavi and William Shakespeare, and perhaps also about Rumi, Goethe and Iqbal?