the miraculous parting of the Red Sea for the Israelites to walk through, he talked about how the entire story of Exodus is a story of salvation of the Israelites. Sometimes the miracles are dramatic, such as God speaking to Moses out of a burning bush. Other times, the miracles take longer and are more subtle, as God patiently works to reform the Israelites' identity as slaves into a free people of faith in God.
This painstaking process was not without set-backs, as when the Israelites made a golden calf to worship. It also was not quick, lasting for two generations. Sometimes, we too expect miracles to happen dramatically and "in a flash." Occasionally, they do, but more often God's salvation takes longer to achieve in our lives too.
You can listen to the sermon here.
You can also listen to the Communion meditation, related to Passover, and the closing benediction.