R. Jonah was a thirteenth-century scholar who lived in Spain. Although originally opposed to Maimonides’ philosophical works (most notably, his Guide for the Perplexed), he later changed his views, and even vowed to travel to Maimonides’ gravesite to posthumously beg for forgiveness. (He indeed began the long journey, but passed away before completing it.)
R. Jonah authored Shaarei Teshuvah (an ethical work on repentance), a commentary on R. Isaac Al-Fasi’s halachic compendium, and a commentary on Ethics of the Fathers, among other works.
Others date his passing as 1 or 28 MarCheshvan.
Link: Rabbeinu Jonah Gerondi
G‑d did not give you light that you may hold it up in the middle of the day.
When you are given light it is in order to accomplish something, to do something difficult and novel.
Go take your light into the dark places and transform them that they may also shine!