Salvation is a gift. You can't earn it.

"Even when we were dead in sins, hath quickened us together with Christ, (by grace ye are saved;)" Ephesians 2:5

"For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not by works, lest any man should boast." Ephesians 2:8-9 

"For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord." 

"Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost." Titus 3:5