God’s decision to declare sinners righteous came from His own initiative. Nothing made Him do it. But from before the foundation of the earth—even before all men sinned—God had planned a means of reconciliation through Christ. He had determined to justify man by identifying him with Jesus Christ. 

By grace (unmerited favor). 

Being justified freely by his grace, through the redemption that is in Christ Jesus (Romans 3:24). 

By the blood of Christ.

Much more then, being now justified by his blood, we shall be saved from wrath through him (Romans 5:9). 

By the resurrection of Christ. 

But for us also, to whom it shall be imputed, if we believe on him that raised up Jesus our Lord from the dead; Who was delivered for our offences, and was raised again for our justification (Romans 4:24, 25). 

By faith. 

Therefore being justified by faith, we have peace with God through our Lord Jesus Christ (Romans 5:1). 

By works. 

Ye see then how that by works a man is justified, and not by faith only (James 2:24).