My Lenten series in 1995 was designed to expose the nature of idolatry ("having or inventing something in which one trusts in place of or alongside of the only true God," Heidelberg Catechism Q & A 95). Despite the prophets' persistent exposure, many of us lightly dismiss the possibility that we have divided, idolatrous hearts. An excellent resource for such a series is No God but God, edited by Os Guinness.
We used the quotes and teasers that begin the sections below in the newspaper ad we ran before each Sunday.