On a tax forms there is a line for “other income.” Jesus said, ‘Don’t store up treasures here on earth, where moths and rust destroys them, and where thieves break in and steal.’ Life’s best income is not tabulated on adding machines or kept in bank vaults. The good news is that tax collectors are unable to reach that “other income”. The real depressions are not the ones we read about when the stock market crashes. Most mortals live in depression all the time, bankrupt in spirit and destitute within. Most are unaware of their spiritual poverty. Even Christians and churches can, like Laodicea, be “rich, and increased with goods, and have need of nothing” (Revelation 3:17), not knowing that they are poor, miserable, blind and naked.
A man really lives only in proportion to his “other income” of the spirit. Can you list any such non-taxable revenues? The goodness of God day by day, good health, the love of dear ones, liberty and life itself! But the best of all is the gift of God, eternal life through His Son and the earnest of the Spirit, the first down-payment of a heavenly income from then on, forever. Can you list that?
A man may draw a financial income for a while, but without revenue from above he will be a pauper in his soul. Do you have another income?
Extract from: Peace in the Valley, by Vance Havner
Let say a person involve in her Christian ministry come to you and say that he thinks he should take a Sabbatical from her ministry because feeling tired or unmotivated any longer.
What would be your answer? The natural answer would be, ‘yes, I understand, you been involved for many years, a little break would not hurt. Unfortunately, rarely did I saw these people getting involved again.
What would be a more Biblical way to answer them?
Lately, I was greatly encouraged by John Piper counsel. He wrote, “We find ourselves not energized for any great cause, but always thinking about the way to maximize our leisure and escape pressure.” The problem is not exhaustion cause by the work, but a person can gradually become so SELF-ABSORPTION that he doesn’t have any resources for God’s work. Isaiah 58: 10-11 mention when people focus on helping others they will be “like a well-watered garden”. Jesus also mentions “rivers of living water that will flow out of the individual life.” God has made us to flourish by being spent for others, not on ourselves. Jesus said, “It is more blessed to give than to receive” (Acts 20:35). Pipers add, “My point is that one of the causes of some people’s darkness is a slowly creeping self-absorption and small-mindedness.” 
Before you feel like taking a sabbatical take time to examine what motivate you.
 John Piper, When I Don’t Desire God: How to Fight for Joy (Wheaton, IL: Crossway Books, 2004), 227.