1 Cor 13:13 And now these three remain: faith, hope and love. But the greatest of these is love.
In Christianity, love is the fulfillment of the Law, it is the defining feature of what is good - so much so that God is said to be love.
Since love > faith, faith != love, and thus faith is not what constitutes that which is good.
Furthermore, love is common and accessible to all, but faith is bestowed upon us as a gift.
John 6:44 No one can come to me unless the Father who sent me draws them, and I will raise them up at the last day.
Romans 10:14-15 How, then, can they call on the one they have not believed in? And how can they believe in the one of whom they have not heard? And how can they hear without someone preaching to them? 15 And how can anyone preach unless they are sent? As it is written: “How beautiful are the feet of those who bring good news!”