In his letter to the Hebrews , for example , he clarifies how Jesus as a “ faithful high priest ” could once and for all time offer a “ propitiatory sacrifice ” making it possible for those exercising faith in it to obtain “ an everlasting deliverance . ” One day the Holy Prophet (s) entered the mosque and saw two groups of people busy in two different activities. One group was praying and praising Almighty Allah, while the other was busy teaching and learning. He (s) smiled and commented, “Both groups are performing noble acts and will achieve perfection in what they commit themselves to with earnestness, and be blessed for it. However, I have been sent to teach people, guide them on the path of truth and wisdom.” Saying this, he (s) proceeded towards the group that was busy learning and teaching and became actively involved in their work.