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21 Wherefore lay apart all filthiness and superfluity of naughtiness, and receive with meekness the engrafted word, which is able to save your souls.

22 But be ye doers of the word, and not hearers only, deceiving your own selves.

23 For if any be a hearer of the word, and not a doer, he is like unto a man beholding his natural face in a glass:

24 For he beholdeth himself, and goeth his way, and straightway forgetteth what manner of man he was.

25 But whoso looketh into the perfect law of liberty, and continueth therein, he being not a forgetful hearer, but a doer of the work, this man shall be blessed in his deed.

26 If any man among you seem to be religious, and bridleth not his tongue, but deceiveth his own heart, this man's religion is vain.

27 Pure religion and undefiled before God and the Father is this, To visit the fatherless and widows in their affliction, and to keep himself unspotted from the world.

Then in James 2:8 he calls it the "royal law of scripture" If ye fulfil the royal law according to the scripture, Thou shalt love thy neighbour as thyself, ye do well:

This "perfect law of liberty", this "royal law of scripture" is to love one another as our King commands, and not merely in lip service but in action. Our circumstance, and our perceived ability to love, are temporal. The command is eternal. If we break free from the prison of self, we realize our circumstances and even our abilities are nothing. The King has commanded us to love. We believe, and by faith we obey.

And obedience requires endurance. But the prize awaits. See e.g., James 1:12 Our prison is not circumstance. It is our inability to see past self, in the present circumstance. That's why James calls it "the perfect law of liberty". We see, we believe, we obey, we are set free.