In Christianity, faith causes change as it seeks a greater understanding of God. Faith is not only fideism or simple obedience to a set of rules or statements. Before Christians have faith, they must understand in whom and in what they have faith. Without understanding, there cannot be true faith, and that understanding is built on the foundation of the community of believers, the scriptures and traditions and on the personal experiences of the believer. In English translations of the New Testament, the word "faith" generally corresponds to the Greek noun πίστις ("pistis") or to the Greek verb πιστεύω ("pisteuo"), meaning "to trust, to have confidence, faithfulness, to be reliable, to assure".