Abu Hamid al-Ghazālī,
Al-Ghazali letter to Nizamuddin Ahmed bin Ishak
“ As your Excellency invites me to a place of new and unimaginable possibilities of development, in the like manner, I invite your Excellency to the attainment of the elevation of your life and its spiritual progress. When you rise from the platform of commoners, you will be made to plunge into one of the oceans of favors and kindness and mercy, and will be clothed with the robes of light and Divine secrets and rare knowledge of the Divine.The Holy Prophet, praise and peace be upon him, said: "When a man treats you with kindness reciprocate with a better kindness." ”
