Weariness can stymie ministry and that is why God directs His children to rest and to care for our bodies. God gives instruction in the Bible about rest and good health. He began with establishing a day of rest. Our powerful God did not require rest, but He surveyed His Creation,declared it good, and rested. We can work with excellence and then cease our work and meditate on the Creator.
Paul called our bodies a temple in 1 Corinthians 6: 19-20.
Or do you not know that your body is a temple of the Holy Spirit within you, whom you have from God? You are not your own, for you were bought with a price. So glorify God in your body.
God calls for our very best in serving Him. Time in prayer, time resting, time enjoying God's creation are times renewing both our body and soul. People sometimes smile about my early morning coffee sessions, but that is my time with God renewing and resting and conversing with God. I cherish that hour when the sun first shows brilliant color across the sky. God clears out the cobwebs of confusion in my head as I sit quietly.
My physical health has always been a priority, and prayer and quietness with God is an essential factor in our health. Sometimes I am weary and know not why, but my Heavenly Father does. Being still in his presence is healing salve for the weary. Find time for your renewal with God. You will be amazed at the outcome.
Come to me, all who labor and are heavy laden, and I will give you rest.
Fear not, for I am with you; be not dismayed, for I am your God; I will strengthen you, I will help you, I will uphold you with my righteous right hand.