Honestly, the answer will very from person to person. The definition of fulfillment is the achievement of something desired, promised, or predicted.

There is fulfillment in knowing that you did a good job at work or home. But the biggest fulfillment is knowing that you did well in your Christian life. Serving God is the true source of fulfillment in this life.

But the thought I want you to think about is, in your day-to-day life what are you seeking for or doing to find fulfillment?