How do we know faith is important in the Christian life?

Faith plays a critical role in the life of a believer as it is through faith that we are justified and saved. In Matthew 8, the centurion displayed extraordinary faith by believing that Jesus could heal his servant with just a word, stating, 'But speak the word only, and my servant shall be healed.' Jesus remarked on the strength of his faith, saying, 'I have not found so great faith, no, not in Israel.' This indicates that faith is not merely intellectual agreement but a deep trust in God's power and willingness to act. True faith leads us to submit to God's will, confident in His goodness and mercy, even when circumstances are difficult.