Silence has many dimensions. It can be a regression and an escape, a loss of self, or it can be presence, awareness, unification, self-discovery. Negative silence blurs and confuses our identity, and we lapse into daydreams or diffuse anxieties. Positive silence pulls us together and makes us realize who we are, who we might be, and the distance between the two. Hence, positive silence implies a choice, and what Paul Tillich called the "courage to be."
Klee died relatively young and his style changed as the inevitability of death became inescapable. With great seriousness in one of his last paintings, Klee announces that death is a purifier, like fire, and a means to fulfillment. This is the once terrible, seen as the most beautiful. This is the real power of joy, to make us certain that beneath all grief, the most fundamental of realities is joy itself.
Entering into silence is like stepping into cool clear water. The dust and debris are quietly washed away, and we are purified of our triviality. This cleansing takes place whether we are conscious of it or not: the very choice of silence, of desiring to be still, washes away the day's grime.