If you don't believe it you won't understand it.
When large numbers of people share their joy in common, the happiness of each is greater because each adds fuel to the other's flame.
Did my infancy succeed another age of mine that dies before it? Was it that which I spent within my mother's womb?... And what before that life again, O God of my joy, was I anywhere or in any body?
We must understand then, that even though God doesn't always give us what we want, He always gives us what we need for our salvation.
He who labours, prays.