John 8:36
Therefore if the Son makes you free, you shall be free indeed.

Freedom is a much spoken and fought for right over the last few centuries. For most of human history, freedom had not been a universal right. During the times of occupation and subjugation of the Roman Empire, the time when our Lord Yshua lived, he spoke of freedom and promised true freedom for those who follow Him. How can He promise to deliver freedom, unless He is the true ultimate highest authority. And the freedom He promises, is the true ultimate freedom for a human being.

and do not be entangled again with a yoke of bondage

Galatians 5:1
Stand fast therefore in the liberty by which Christ has made us free, and do not be entangled again with a yoke of bondage. 

A lot of ideas is packed into this one verse of Scripture. Stand fast means to be consistent and continue. That which we are called to stand fast is the liberty or freedom that Jesus has won for us. He has released us from many bondages including those inflicted by ourselves, by others and by the Enemy. And once we are freed by Jesus, we are warned not to cause ourselves or others to fall into bondage again.