Doing what is rightious is doing what is right which is being obedient to God by obeying what he commands which is to believe on the name of his son Jesus Christ and keep his commandment to love one another as he gave us.
And if we really are his disciples we will continue in his teachings and we shall know the truth and the truth shall set us free free from sin.
So having our mind prepahred for action we are to hope fully in the grace being given to us now by the revelation of Jesus christ (his grace) as obedient children.
And we are to no longer to be conformed to our former ignorance that we still desire ( the mind of the flesh doing works of law)