Shaykh Hamza Yusuf on the 19th Letter from Imam Rabbani’s Mektubat on the topic of Tribulation and Ease. This book is an inspiration for Imam Said Nursi’s Risale-I Nur Collection which also has a book called Mektubat. In this video Shaykh Hamza includes advice from Imam Nursi. Imam Rabbani is a Mujaddid (reviver) of India and Imam Nursi is a Mujaddid of Turkey.