Some people worry constantly, replaying past hurts and imagining possible futures, even though the present moment is without danger.
And sometimes we tell ourselves that we are in control, that we can can manage, that we are getting by; but in fact the body-mind is carrying unrecognised anxiety, fear and sadness which we don't want to feel.
Great effort is expended in avoiding what this present moment feels like; turning away from the emotions of the body and mind.
So when you practice stillness, be open to the possibility of surprise. You might be surprised by joy. You might be surprised by sadness.
But don't turn away. There is something important in this emotional space which your willpower does not control. It asks for space and attention to reveal itself. If a feeling keeps recurring, something is calling out to be heard.