David was one of the greatest scientists in his field. I was in awe of him long before we even met. I was so fortunate to have worked with and become a friend of such a caring, supportive and kind person. He was soft spoken although when he thought and then spoke so clearly, one wished he could never end. He was also a lot of fun with a clever cheeky sense of humour. He provided me with such a fantastic start to my career and I will always be grateful for all he contributed and for guiding me. Thank you for all the love and phenomenal research you brought to the world!