I did not know then that this is what life is - just when you master the geometry of one world, it slips away, and suddenly again, you're swarmed by strange shapes and impossible angles.
It is important for us to make a distinction between the spiritual fruit of joy and the cultural concept of happiness. A Christian can have joy in his heart while there is still spiritual depression in his head. The joy that we have sustains us through these dark nights and is not quenched by spiritual depression. The joy of the Christian is one that survives all downturns in life.