J.C. Ryle says it this way,
"He who abides in Me, and I in him, the same brings forth much fruit" (John 15:5). The branch which bears no fruit is no living branch of the vine. The union with Christ which produces no effect on heart and life is a mere formal union, which is worthless before God. The faith which has not a sanctifying influence on the character is no better than the faith of devils. It is a "dead faith, because it is alone." It is not the gift of God. It is not the faith of God’s elect. In short, where there is no sanctification of life, there is no real faith in Christ.... He who is born again and made a new creature receives a new nature and a new principle and always lives a new life.
Ryle, J.C.. Holiness . Fig. Kindle Edition.