Philippians 3:4-11
If anyone else thinks he has reasons to put confidence in the flesh, I have more: circumcised on the eighth day, of the people of Israel, of the tribe of Benjamin, a Hebrew of Hebrews; in regard to the law, a Pharisee; as for zeal, persecuting the church; as for legalistic righteousness, faultless.
But whatever was to my profit I now consider loss for the sake of Christ. What is more, I consider everything a loss compared to the surpassing greatness of knowing Christ Jesus my Lord, for whose sake I have lost all things. I consider them rubbish, that I may gain Christ and be found in him, not having a righteousness of my own that comes from the law, but that which is through faith in Christthe righteousness that comes from God and is by faith. I want to know Christ and the power of his resurrection and the fellowship of sharing in his sufferings, becoming like him in his death, and so, somehow, to attain to the resurrection from the dead
I don't think that anyone here is advocating not following Christ, or not seeking to do his will. Paul wasn't expressing that thought in this passage either. Rather, like Paul, they are saying that there is a righteousness that comes from following the law, and a righteousness that comes from God, through faith in Jesus Christ.
Although Paul expressed that it is better to have a righteousness that comes from God through faith in Christ, rather than a legalistic righteousness, he also did not advocate not following Christ, or not seeking to do his will. He wrote that we should walk in newness of life, and walk in the Spirit. This is what we believe, as well.
Romans 6:1-4
What shall we say then? Shall we continue in sin that grace may abound? Certainly not! How shall we who died to sin live any longer in it? Or do you not know that as many of us as were baptized into Christ Jesus were baptized into His death? Therefore we were buried with Him through baptism into death, that just as Christ was raised from the dead by the glory of the Father, even so we also should walk in newness of life.