Hal, even though I haven't met you, you are one of the very few people I feel confident in saying I am not sorry for your loss without causing you offense because there is no loss only change.
We are spiritual beings having a human experience and boy your Grandpa sure made good use of his time here by the sound of it. Thank you for sharing some of his life with so many people. Living an inspired life is indeed contagious!
My thoughts are with you to get through this difficult time of not being able to see him with your physical eyes anymore but rest assured he will continue to provide positive guidance in your life, only now he will be able to do so much more effectively from his better vantage point where he can see the "big picture".  
