How do we know righteousness is necessary for salvation?

The Scriptures clearly state that 'the unrighteous shall not inherit the kingdom of God' (1 Corinthians 6:9-10), indicating that righteousness is a prerequisite for entering heaven. Furthermore, Romans 3:10 tells us that 'there is none righteous, no, not one,' underscoring humanity's need for a righteousness that is not their own. This is essential because only the righteousness that comes from Jesus Christ can satisfy God's justice and provide a pathway to eternal life. Therefore, the search for righteousness is not an option; it is a necessity for salvation.