You might be thinking of Shakespeare when I say of professional English language , until you have met Sudeep sir. The high proficiency definitions and extraordinary examples that he provides the students with , is highly appreciable. His vast knowledge over the subject of Physics and his ability of solving the trickiest questions and discussing concepts from the very roots , is something you may never find anywhere else. His motivation to finish ongoing projects as per organised schedule and even to have an organised schedule , is really unmatched.