When we forget that we live by promise, that's when the danger tends to creep in. Because failing to embrace promise means we usually fall back into notions of luck, or even worse--into works.
In the midst of our worship, God admonishes us to remember His goodness, and don't harden our hearts like our ancestors when they forgot God in the wilderness.
The answer to our messages is God's "yes," Jesus, who sends his preachers to proclaim that there's no place for us now other than in the grip of our God and Savior.