When both ethnicity and religious ceremonial observance are eliminated as necessary factors in pleasing God, faith stands alone. Isaiah does not use the word “faith.” Rather, his vocabulary specifies the “humble and meek” (verse 2) and the one who “trembles at my word”(also verse 2). The concept of trembling at God’s word includes obedience to it. People obey whom they fear. Therefore, the essence of faith (belief and trust in God) is obedience to God and his word. Those who obey God give him their highest regard through obedience to him. Another way to say this is that faith (belief and trust in God) leads a person to choose to obey God and his word despite all contrary consequences. …