Christian Liberty is a dicey issue. I do not have a good grasp of what it means. I have begun to study the subject. I tend to lean towards legalism and have to constantly check my motives. Others may tend to lean towards libertinism. Both extremes are equally wrong. John MacArthur gives a good illustration of the Christian struggle between the two extremes in his article: "What is Christian Liberty?"
"Let me illustrate how Christianity relates to the extremes of legalism and libertinism: Christianity resembles a narrow bridge spanning a place where two streams come together. One of those streams is crystal clear, but contains treacherous and deadly rapids; it symbolizes legalism--it appears to be a source of righteousness, but you can't stay afloat in it. Legalism will smash you on its rocks. The other stream is polluted libertinism-- if you fall into it, you will drown because of its filth. Therefore, the Christian must maintain his balance on the bridge between the treachery of legalism and the filth of libertinism. Christians who have fallen into the rapids of legalism destroy the effectiveness of their spiritual lives. Those who are wallowing in the vices of libertinism put themselves in line for divine discipline. Galatians 5:13-16 tell us how to stay on the bridge."
One must be vigilant to stay on the bridge.
Another good article was penned by Gregory Koukl of Stand to Reason which was entitled "Christian Liberty".
Hopefully I will learn to apply the idea of Christian Liberty to my life.
Hopefully my posts will help you better understand the issue.