You might think that peterpi but that is clearly not based on anything in the bible.  Our salvation is based exclusively on accepting that Jesus Christ is our lord and savior, that he died on the cross for the forgiveness of all of our sins, and that three days later he rose from the grave.  It has absolutely nothing to do with good works or leading an exemplary life and that is exactly the point; so that no one can buy their way to salvation.  It is through God's grace and mercy alone that is achieved.

If God was 'just' as you suggest, then almost no one would ever achieve salvation.  We are human, therefore we all sin.  Our words, actions, and thoughts are constantly sinful and Jesus Christ died on the cross for each one of us; for all past, current, and future sins of mankind.  There is no justice, there is no exemplary living, there is no price that can be paid.  Faith in Jesus Christ alone gets you there.