Fatigue is a good thing. You have thought it a bad thing. Tiredness helps you to slow down. Without fatigue, you might keep running all the time. Bless fatigue when it comes to you and honor it. You can't be spending yourself all of the time. There must be pauses, and these you call sitting down, or relaxing, or sleeping. These pauses matter as much as the activity you enter into.

Exercise is wonderful. Rest is too.