What is Christian "Liberty"?

 As free, and not using your liberty for a cloke of maliciousness, but as the servants of God. 2 Peter 2:16

"Christian liberty lies in only one direction, and that is, liberty to doright; and right is nothing else than what the Bible enjoins. 

*When men take the liberty to depart from the rules laid down in the Bible, they cease to be Christian." 

E.J. Waggoner