How do we know that salvation is impossible for humans?

According to the teachings in Scripture, particularly in Matthew 19:26, Jesus points out the impossibility of salvation by human effort: 'With men this is impossible; but with God all things are possible.' This counters the human notion that we can achieve salvation through our actions or decisions. The Scriptures further elucidate that true understanding of salvation begins with the recognition that human attempts to earn God's approval are futile. Only through God's grace and work can one be saved, highlighting the sovereign nature of His will in salvation.