When you no longer have expectations, the unexpected kindness of others and small acts of consideration become like "sweet manna from heaven." The feeling that rises spontaneously within one's heart at such times is true gratitude. When one is accustomed to kindness, one can lose the feeling of gratitude. One must constantly return oneself to the spiritual starting point of no expectations.
... when we do not speak, we may listen, hear, understand, even communicate in other ways. If language distorts, silence may open us to revelation. There are mysteries of life known and apprehended only when one refrains from speech, incommunicable mysteries that transcend the capacity of language.