What does it mean to be successful?
I think that most people would like to make a success of their life, but they would define success differently. I believe that Baden-Powell defined success as being happy - 'contented' might be a better word. For others, success would be to become famous, or powerful, or rich. It might simply be to raise a healthy and happy family who themselves achieve success of some kind. Or it may be to achieve some other personal goal - to win promotion for a football team or to eradicate malaria, for example. My father's goal was to leave the world a better place as a result of living in it. As a partially blind person himself he achieved a measure of success by finding employment for many blind men and women.
In one sense finding the way into eternal life is the ultimate success, but the older I get the more I realize that knowing and believing in Jesus is mainly the result of God's grace rather than anything I have contributed to achieving citizenship in his kingdom.
I think for me success means to discover God's purpose in making me and to fufill it to the best of my ability. That would certainly have been St Paul's definition (see Romans 15.17-21; 2 Timothy 4.7,8), and probably that of many Christians. To meet Jesus Christ in heaven and to hear him say to me, "Well done, thou good and faithful servant: enter into the joy of thy master," would be for me the ultimate seal of a successful life.