Keeping expectations higher than the threshold is the number one cause to live in misery and pain. If we are expecting something from any practical task.

For example - We often exceed the threshold of the expectation. If we are expecting some return from investment. We might become selfish in terms of profits and could easily lose our present moment to earn more. This limit to cross that threshold drives us crazy in terms of every task. It could be anything getting good grades, competing for more, promotions, etc.