If you look at the Greek, you will discover this word free can mean to liberate or to exempt from liability. That means this verse could read whom the son liberates or exempts from liability will be really liberated and exempted from liability. Because of this definition, when you consider this verse in its full context, there are two conclusions I want you to consider. First, there are things Christ has freed you from. Second, there are things Christ has freed you to.
To the Jews who had believed him, Jesus said, "If you hold to my teaching, you are really my disciples. Then you will know the truth, and the truth will set you free." They answered him, "We are Abraham's descendants and have never been slaves of anyone. How can you say that we shall be set free?" Jesus replied, "Very truly I tell you, everyone who sins is a slave to sin. Now a slave has no permanent place in the family, but a son belongs to it forever. So if the Son sets you free, you will be free indeed.
- John 8:31-36 (NKJV)