We are saved by grace through faith by grace lest any man should boast God so much love mankind that he gave his only begotten son for us to die on the cross of Calvary that gave us eternal life.When Jesus blood was shed on the cross all our sins was taken away Jesus even said it is finished that means there was nothing left.
All humans are now reconciled back to God the Bible says there is no more condemnation to them that are in Christ, apostle Paul said I am crucified with Christ meaning he is dead with Christ nevertheless he lives not yet he but Christ that lives in him. This brings us to the path of the living dead,a dead man cannot commit sin.
We Christians should be dead to sin and to achieve this first is accepting the will of God which is Jesus death on the cross of Calvary,believing that he died for you and building your faith in Him by fellowshiping with him through reading his word 'the Bible' and praying.