"Being justified freely by His grace... through faith in His blood." Rom. 3:24, 25.
The source of justification is the free and sovereign grace of God, who sent His only begotten Son to be our Savior.
The basis of justification is the precious blood of Christ shed for our sins on the cross.
The means of justification is the believer's faith which believes God and receives Christ as Savior and Lord.
The result of justification is that our faith is reckoned to us as righteousness. God becomes our Defender. "It is God that justifieth." Rom. 8:33.