We don't belittle the Word of God, only the Protestant retelling and redefinition of God's Word. We hold the New Testament is fulfilled in the New Testament. You have to know and understand the Old Testament to understand the New Testament and the Church the New Testament
The Church, as early as apostolic times,( Cf. 1 Cor 10:6,11; Heb 10:l; l Pet 3:21.) and then constantly in her Tradition, has illuminated the unity of the divine plan in the two Testaments through typology, which discerns in God's works of the Old Covenant prefigurations of what he accomplished in the fullness of time in the person of his incarnate Son. [CCC 128]
Christians therefore read the Old Testament in the light of Christ crucified and risen. Such typological reading discloses the inexhaustible content of the Old Testament; but it must not make us forget that the Old Testament retains its own intrinsic value as Revelation reaffirmed by our Lord himself.( Cf. Mk 12:29-31) Besides, the New Testament has to be read in the light of the Old. Early Christian catechesis made constant use of the Old Testament. ( Cf. 1 Cor 5:6-8; 10:1-11.) As an old saying put it, the New Testament lies hidden in the Old and the Old Testament is unveiled in the New.( 1 Cor 15:28)[CCC 129]
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