Sola Fide is hiding again
To love is to live according to his commandments: this is the commandment which you have heard since the beginning, to live a life of love. (2 John 6)
If you love me you will keep my commandments. (John 14:15)
A man cannot hate God and at the same time have saving faith. Therefore he must love God (which itself is going beyond the Protestant idea of sola fide), and if he loves God then he must obey Him. If we do not obey Him, we do not love Him and therefore have no reason to think that we shall be saved no matter what we believe “by faith alone”.