In this sermon, the speaker emphasizes the importance of recognizing our unity with Christ through his death, burial, and resurrection. He encourages the audience to be informed and instructed in their minds, so they can effectively share the message of redeeming love. The speaker also highlights the need for vision and mission to work together, as vision without mission is merely visionary and mission without vision becomes drudgery. The sermon concludes with a reminder of the overflowing love of God, which should lead believers to have a heart for the perishing souls around them.