Since life is unpredictable, it can bring any of those undesirable experience at any time.
To defend against this possibility, the ego builds up a story about what a person’s life is all about, and in this story things are not unpredictable—far from it.
Most people think, say, and do what they said, thought, and did yesterday. In this way we feel a measure of security, but it comes at the cost of losing our infinite potential. Nothing limits the unlimited reservoir of thoughts, words, and creativity except our self-imposed boundaries.