What does the Bible say about the condition of being spiritually dead?

According to Romans 5:12, sin entered the world through one man, Adam, and thus death spread to all men because all have sinned. This spiritual death implies that we are not merely injured by sin but completely unable to respond to God or seek Him without His enabling grace. Ephesians 2:1 reinforces this by stating that we were dead in our trespasses and sins, illustrating our lost condition apart from Christ. It is through the Lord's grace that we are awakened and made alive, which is essential for our understanding of salvation; we can do nothing to merit it on our own, and must rely fully on Christ's redemptive work.