If you don’t master something but let it master you, you will become a slave to it. Work is good for you but if you work in excess, it will destroy you. You can read Deuteronomy 5:12-15 for proof. We are instructed in Exodus 20:9-10 to rest on the Sabbath day for a special reason – we ‘need’ rest. Anybody who thinks otherwise is fooling themselves and will pay the consequences for their disobedience.