Over commitment in business is usually due to a lack of faith, which results in fear - specifically, the fear of failure. But if we really believe God is in control, then we also should believe He's able to make us successful while we are keeping our lives in balance.
How we use our money is the clearest outside indicator of what we really believe. ... If someone is a true disciple of Jesus Christ, the evidence will be found in that person's everyday life - including his or her use of money.