It is true that salvation is through faith alone, but what does faith mean? It is more than just believing in Jesus, his death and resurrection. Faith includes the need for water baptism, Mark 16:16. Faith means keeping the commandments, John 14:15, Romans 6:23, Ecc. 12:13. Faith means abstaining from future sin, Hebrews 10:26,27. Faith means seeking forgiveness for sins after water baptism, 1 John 1:9. This is true Christian faith in practice. In order to live, you have to live it out.