I really like these verses in James 4:13-17.

Now listen, you who say, "Today or tomorrow we will go to this city or that city. Spend a year there, carry on business and make money." Why, you do not even know what will happen tomorrow. What is you life? You are a mist that appears for a little while and then vanishes. Instead, you ought to say, "If it is the Lord's will, we will live and do this or that. As it is, you boast and brags. All such boating is evil. Anyone, then, who knows the good he ought to do and doesn't do it, sins.

Do you have ambitious plans for your life? Are you securing your future by your well paid job? Do you boast about your sucess? Do you justify your life by saying that you can still love God and be sucessful? If you find yourself guilty for all those things above, then you should examine what this passage has to say. James said our life is a mist and it will appear for a little while and then vanishes. He said no one should boast about tomorrow for you do not know what will happen. For one thing, you can die and be empty before the throne of God. Anyone who live should live for Christ. Their life should be in Christ and their deeds should reflect that life. If anyone who knows that good he ought to do and doesn't do it, sins.

I know I have been guilty of living a life for myself. I have thought of wanting a life that is about my desires and not about God's. An example of this would be my hunger to excel in school and my desire to prove my worth through success. When I was honest with myself, I finally learned that it's really obvious whether or not you love God. People can see it, the way you think reflects it. When you live a life for Christ, you can see growth around you and people are blessed by your presence. That is the fruit of a Christian. A life lived for yourself is meaningless, it bears no fruit and will all vanish on the day of Judgement. A life lived for God is eternity.