20 Essential Comic Issues You Must Read Before You Die
19. The Flash #0
Wally West has often been described as the heart of the DC Universe. This issue makes it clear why.
After getting sucked into the Speed Force during Zero Hour, Wally spends this issue bouncing around the timestream and revisiting key moments in his life. Before returning to the present, he approaches his younger self (who had just discovered his powers) and assures him that everything is going to turn out great.
When the darkness and cynicism of modern comics (and modern everything else) gets a bit much, it's nice to go back to stories like this with such positive messages.