Most importantly, he had done what God had dispatched and called him to do. As a result, he was fully aware of the return on his investment. It has been an issue since the beginning of time for man. The key point to recognize here is that instead of using money, our investments are denoted by our actions. Every act is a seed being sowed and every seed will grow.
People put stock in working in and around the church.
People put stock in blind, undying support and submission to leadership. People put stock in their mother or father or some other relative's relationship with God as if they don't have to do anything for themselves. Like Saul, some put stock in the favor of man. People becomes ushers, choir members, trustees, deacons, security guards, church secretaries, worship leaders, youth ministers, singles ministry directors, etc., and place a great deal of confidence in their actions, all the while missing one key point. We MUST place stock in the word of God and holiness above all that we do.