romans 4

For if Abraham was justified by works, he has something to boast about, but not before God. For what does the Scripture say? "Abraham believed God, and it was counted to him as righteousness." Romans 4:2-3
God intended for righteousness to come to us through faith, because faith is trust and trust is the basis of a relationship with Him. if it had been through works, not only would we be able to boast, but there would also be no love for God- we would be ungrateful and trust in ourselves.
For if it is the adherents of the law who are to be the heirs, faith is null and the promise is void. Romans 4:14
again, God made it so that salvation would not come through works, but through faith- a complete and total surrender of ourselves- trusting in the Lord wholeheartedly, giving Him all of the glory! and it is the truth that we must trust in the Savior, because of our failure uphold the law (Romans 4:15).
No distrust made him waver concerning the promise of God, but he grew strong in his faith as he gave glory to God, fully convinced that God was able to do what he had promised. Romans 4:20-21
despite the fact that he was old and his wife was barren (Romans 4:19), abraham believed that God would make him father of many nations. he believed that God, who created the universe could bring life to that which is dead (Romans 4:17). therefore, it is no surprise that our Lord Jesus was raised from the dead for our justification (Romans 4:25)! glory be to Him forever!