Generally, novices who sit still often find their thoughts confused, even more agitated than when they are not sitting.
Therefore, they are even more afraid that they should not "sit still and wait for death", or add legends such as martial arts novels and folk myths. I am afraid that "sitting still and waiting for death" will be "possessed". In fact, this is all unknown. I put my head on my head, making mistakes and misunderstanding, which constitutes a psychological shadow.
Body shaking is because balance is difficult to coordinate with limbs. You can add a cushion to balance it. Sometimes I feel my brain shaking when I close my eyes. Then this is poor health, qi deficiency, just drink some tonic soup to replenish qi.