If you are feeling tired or ill, rest. Your body will always want rest and ease if it's sick. When you become quiet, ask your body what you need to do in order to heal yourself. Your body may tell you to change certain habits, eat more wholesome food, express some feelings, quit your job, see a doctor, or it may have some other message for you, but there is always an answer available to you. The key is to ask and then listen honestly for a response.
If then you remain constant in faith in the face of trial, the Lord will give you peace and rest for a time in this world, and forever in the next.