By faith we are sure of things we cannot see. The document discusses examples from Hebrews 11 of people who lived by faith: Abel offered worship to God by faith; Enoch walked with God by faith; and Noah built an ark by faith, even though he had never seen rain. It emphasizes that faith is not a leap in the dark, but having certainty in God and his promises, even without full understanding or reason. Faith leads believers to worship God and walk in obedience to his word.