That which is imposed upon you is non-essential; it creates your personality. The essential is your individuality; the non-essential is your personality. In other words, the essential is your very soul, your being; the non-essential is your ego. All that helps the ego is non-essential; all that helps you to become egoless is essential. Ambition is non-essential, greed is non-essential; desire, any kind of desire, is non-essential.