"But the end of all things is at hand: be ye therefore sober, and watch unto prayer." 1 Peter 4:7 (KJV)
As ministers of the Gospel, we must be awake and alert in the spirit; let your life be guided by His love, by His Word and by your expectation of His coming. Let your desire to win more people to Christ flourish, because we've got to win them; otherwise, they'll perish without God.
This is the drive; this is what keeps us working to make sure we leave no stone unturned in our quest and pursuit for the souls of men.