A portion of the memorial to my son seems appropriate, and I am sure each of us feels the same about our departed friends.

I will give you Grant on loan for a little while. For you to love while he lives and mourn when he is dead. I don't know for how long, but until I call him back, will you please take care of him for me. He will bring his charms to gladden you, and should his stay be brief, you'll have his loving memories as solace for your sadness. For all the joy this child shall bring to you, you will run the risk of grief. Shower him with tenderness and love him while you may. The happiness that you will know will be with you forever.