From St. Tikhon's "True Christianity"
"If someone should say that true faith is the correct holding and
confession of correct dogmas, he would be telling the truth, for a
believer absolutely needs the Orthodox holding and confession of
dogmas. But this knowledge and confession by itself does not make a
man a faithful and true Christian. The keeping and confession of
Orthodox dogmas is always to be found in true faith in Christ, but
the true faith of Christ is not always to be found in the confession
of Orthodoxy... The knowledge of correct dogmas is in the mind, and
it is often fruitless, arrogant, and proud... The true faith in
Christ is in the heart, and it is fruitful, humble, patient, loving,
merciful, compassionate, hungering and thirsting for righteousness;
it withdraws form worldly lusts and clings to God alone, strives and
seeks always for what is heavenly and eternal, struggles against
every sin, and constantly seeks and begs help from God for this." And
he then quotes Augustine of Hippo, who teaches: "The faith of a
Christian is with love; faith without love is that of the devil".