The Maulana was greatly pleased. He blessed Maulana Mohammad Yusuf and said, “All the skill and intelligence should be employed in the service of Deen of Almighty Allah.” (To save Whole Mankind from Fire of the Hell.PARADISE FOR ALL MANKIND..This was the Motto of Prophet Muhammad Sallallahu Alaihu wasallam.He even cried at the death of a Jew. We are his ummati Our concern should be same.Inviting fellow Humankind to their creator The Almighty to save all from fire of Hell.(ALL HUMANS ARE OUR REAL BROTHER AND SISTERS AS ALL ARE SON AND DAUGHTER OF ADAM ALAIHISSALAM,the first man on the face of Earth who was first Prophet Also. May Allah guide whole mankind.)
Dr. zakir Hussain himself was a teacher and was knowing that nurturing someone is most difficult task. When he saw Maulana Ilyas nurturing the illeterate and Ignorant at large scale he got impressed by him in initial contacts. Dr. zakir hussain famous sentence for nurturing "It is like a hen sitting on egg for chicken. In result many eggs will be destroyed only few will become successful."
About his association with Maulana Ilyas Mr. Ziaul Hasan Faruqi sb also written in his book Dr. Zakir Hussain: Quest for Truth APH Publishing, India page no 127 the following.