Joshua 24:15

If it seems evil to you to serve the Lord, choose for yourselves this day whom you will serve, whether the gods which your fathers served that were on the other side of the River or the gods of the Amorites, in whose land you dwell.  But as for me and my house, we will serve the Lord.  

What we choose to serve in this life will affect our lives here and in eternity.  It is no small matter and one that reflects what we truly believe in and guides our decisions.  There is no sitting on the fence with God because His dedication to our lives is a covenant promise.  Jesus died on the cross to save us, and God is just asking us to choose.