Nothing, in truth, can ever replace a lost companion. Old comrades cannot be manufactured. There is nothing that can equal the treasure of so many shared memories, so many bad times endured together, so many quarrels, reconciliations, heartfelt impulses. Friendships like that cannot be reconstructed. If you plant an oak, you will hope in vain to sit soon in its shade.
For such is life. We grow rich as we plant through the early years, but then come the years when time undoes our work and cuts down our trees. One by one our comrades deprive us of their shade, and within our mourning we always feel now the secret grief of growing old.
Antoine de Saint-Exupery
In light of recent event, I found these words comforting.