Buddha is said to have given a "silent sermon" once during which he held up a flower and gazed at it. After a while, one of those present, a monk called Mahakasyapa, began to smile. He is said to have been the only one who had understood the sermon. According to legend, that smile (that is to say, realization) was handed down by twenty-eight successive masters and much later became the origin of Zen.
Eckhart TolleSo give your complete attention to what you feel, and refrain from mentally labeling it. As you go into the feeling, be intensely alert. At first, it may seem like a dark and terrifying place, and when the urge to turn away from it comes, observe it but donโt act on it. Keep putting your attention on the pain, keep feeling the grief, the fear, the dread, the loneliness, whatever it is. Stay alert, stay present - present with your whole Being, with every cell of your body. As you do so, you are bringing a light into this darkness. This is the flame of your consciousness.
Eckhart TolleI have seen cases where people seemed to become totally free of ego, and at some point in their lives the ego came back. It has happened, for example, to some spiritual teachers. At some point in their lives, they began to identify again with form.
Eckhart Tolle