Do we win souls for Christ?

We all have occupations and things that occupy our everyday life, and those things have to be done.  There is typically much emphasis placed on our natural career or accomplishing and getting things done.  But that is not our ultimate calling here upon the earth.  Our purpose here on this earth is to advance the Kingdom of God; to win souls for Christ.  When we occupy ourselves with our ultimate purpose here on earth, it gives our life so much more meaning.  It means that we occupy ourselves with something eternal versus just transitory.  (Daniel 12:3)