The churches shall know that Christ searcheth the hearts : Set forth in the first sermon that was preach'd in the new meeting-house in Summer-Street, Boston. On January 8. 1716,17. being a day of fasting and prayer; to obtain Gods gracious presence with, and blessing on, the congregation who design'd to attend Gods publick worship in that place; and new publish'd at their desire. By Benjamin Wadsworth, A.M. Pastor of a church of Christ in Boston, N.E. [Two lines from Proverbs].