Why would your friend need consoling, what doctrine would comfort him? He should be happy that his grandpa recovered, and that I understand is already a miracle from God. Why would equate his grandpa's salvation with his pastorate, it is not something that is earned. Remind your friend that what his grandpa need is his encouragement and love and not for him to ask of now. Just an opinion but may your friend found true comfort from the Great Comforter