This sermon was built around the Collect for Labor Day and the readings assigned for Proper 17 in Year B of the Revised Common Lectionary.
Here is that collect:
For Labor Day Almighty God, you have so linked our lives one with another that all we do affects, for good or ill, all other lives: So guide us in the work we do, that we may do it not for self alone, but for the common good; and, as we seek a proper return for our own labor, make us mindful of the rightful aspirations of other workers, and arouse our concern for those who are out of work; through Jesus Christ our Lord, who lives and reigns with you and the Holy Spirit, one God, for ever and ever. Amen. (BCP p. 261)