How do we know we are dead in sins according to Scripture?

Ephesians 2:1 says that we were made alive who were dead in trespasses and sins, illustrating our state before receiving grace from God. This metaphor emphasizes total inability to respond to God while in our sinful condition, akin to a corpse being unresponsive. Paul describes this condition of death, affirming that all have sinned and fall short of God's glory (Romans 3:23) and that by nature, we are children of wrath (Ephesians 2:3). It underscores the necessity of being 'born again' to see the kingdom of God and comprehend spiritual truths.