The document outlines the Catholic concept of faith, describing it as a personal adherence and submission of the whole person to God who reveals himself. It states that faith requires a belief in God as Father, Son, and Holy Spirit, and is both a supernatural gift from God that requires the Holy Spirit's interior help, as well as a conscious, free human act that is also ecclesial in nature. Faith further requires a belief in all that is contained in God's written word and what the Church proposes is divinely revealed, and that faith is necessary for salvation and a foretaste of future blessed knowledge.