David was not allowed to build the temple; that honor went to his son, Solomon. But David did do all he could to help Solomon for this great project. This is how many of our lives operate as well: there is a bunch of work done by a person who does not get to experience the result. People do not grow like corn, that is, in somewhat stable predicable patterns. Your years of involvement as a friend, parent, or relative, could very well be the all-but-completed foundation that someone else gets to build upon. However, God knows our hearts and He sees our work. Therefore, we can be glad – the timing is up to the Lord. Our job is to be faithful in the work He has set before us.
Note: I was away from the computer for a while so the previous posts were backdated.