What is the heaviest burden you've ever carried? There are all kinds of weighty troubles that people bear; but there's one burden that's heavier than all the rest—and it is the most profound, heartbreaking, and destructive burden of them all—sin. Christ triumphed so that we wouldn't have to suffer bondage to sin, separation from God, the effects of His wrath, or eternal death.
The Disciple's Rest
In Mark 6, the disciples were sent out to do work that was difficult emotionally, physically, and most of all spiritually.