Minimalism for the Mist

I came across an article today by John Piper entitled, "Should I Invest for Retirement?" and really enjoyed his concluding paragraph, which I've pasted below. I hope I live it and I hope you do too. The link to the full article is: http://www.desiringgod.org/ResourceLibrary/AskPastorJohn/ByTopic/8/2727_Should_I_invest_for_retirement/

"So, all that to say, put a governor on your life. Make as much as you can, give as much as you can, and save what you need to in order to be a responsible non-borrower. Then do retirement with some minimalistic plan that frees you up for gospel ministry till the day you drop."

"Why you do not even know what will happen tomorrow. What is your life? You are a mist that appears for a little while and then vanishes." James 4:14