Satisfaction

About ten days back I received a request from a student of the M.Sc. Teck class, Isaac Paul, for an endorsement on linked in. I simply wrote whatever came to me on tne spur of the moment, because I distinctly  remember him and almost every one in his batch,though it is decades since I saw him. He does have a very successful career ,starting in HPCL and then moving to the middle east.So I was surprised to receive a mail from him the next day. He said he never felt so proud in his whole life! He MUST have had many proud moments. If a few lines from me could make him proud, well I am overwhelmed. I knew of many students of mine who told their brothers, sisters, cousins, friends to join in applied physics/ instrumentation so that they can be my students, but this beats all of them, except one. One student who was a well known professor in Switzerland at that time wrote to me that till  that day he starts his course on thin films in the exact words with which I did when teaching his class.
A satisfying life, indeed.