Prof, Grandpa (as some of us secretly called you), I am grateful to have had you in my life. A teacher, father, mentor and friend. In you I saw a lot of what I want to know and be. With your unselfishness and patience, you taught and guided, aiming to make me the best possible scientist you could. Thank you. I count myself privileged to have been one of your very last students. You pushed me to and beyond the limits of what I thought possible. And for being one of the many lives you touched with your goodness, I pray that this goodness will continue to spread to other people through the things you taught and how you taught. Till we meet again across the river, fare thee well.