Faith, thus receiving and resting on Christ and his righteousness, is the alone instrument of justification:1 yet is it not alone in the person justified, but is ever accompanied with all other saving graces, and is no dead faith, but worketh by love.2
But to all who did receive him, who believed in his name, he gave the right to become children of God,
For we hold that one is justified by faith apart from works of the law.
5:1 Therefore, since we have been justified by faith, we have peace with God through our Lord Jesus Christ. (ESV)
So also faith by itself, if it does not have works, is dead.
You see that faith was active along with his works, and faith was completed by his works;
For as the body apart from the spirit is dead, so also faith apart from works is dead.
For in Christ Jesus neither circumcision nor uncircumcision counts for anything, but only faith working through love. (ESV)