In 1 Timothy 6:6 we learn that godliness is a means of great gain when accompanied by contentment. In other words, the way to great gain, the way to living a fulfilled life comes through two things and neither involved money or material possessions. The formula is this - godliness plus contentment equals great gain. Godliness is simply knowing, loving and serving God. The second ingredient is being content with what you have. If you are not content with what you have, you will never be able to live life to the fullest.
What's difficult about this is that we have a warped view of contentment. We live in a culture today where we think that if we could just have more we could really enjoy life. Ecclesiastes 5:10 teaches that the one who loves money will not be satisfied with money and the one who loves abundance will never be satisfied with their income. If you are searching for fulfillment in life through attaining some other object, some other possession, that's like trying to quench your physical thirst by drinking saltwater. All it does is make you even thirstier. The way to live life to the fullest is to know God, love God, and serve God and to be content with what you have. Godliness plus contentment equals great gain