Ecstasy results from the wisdom of emptiness, of seeing the impermanent, insubstantial nature of all phenomena, where there is no clinging, no attachment, and no fear. In this experience, we become one with the unfolding process of life. This oneness is quite subtle, because it is the oneness of becoming zero.
I have found that the greatest degree of inner tranquility comes from the development of love and compassion. The more we care for the happiness of others, the greater is our own sense of well-being. Cultivating a close, warmhearted feeling for others automatically puts the mind at ease.