We live in a very workaholic world nowadays. People work several hours a day, every day of the week. There's a time this can become really stressful and when stress is not dealt with properly it can lead to distress. It is very worrying the damage that stress has done to many hard working and sincere people.
Resting is not a sin. Infact it is as Biblical as working. God Himself rested, so why shouldn't you? Many have been decieved into thinking if you don't work yourself to stress you'll never make it. But many have died because they could not manage the distress that accompanied their physical exhaustion. Don't add up to that number Learn to work well and also to rest well. Don't only plan for work, also plan for rest.
Have you rested? Be warned, stress can become distress. And distress can be fatal. You must not work yourself to death to succeed. Work hard and rest hard too! You need it to survive!