'Demonstrate' in the Bible

“He who offers a sacrifice of praise and thanksgiving honors Me;And to him who orders his way rightly [who follows the way that I show him],I shall show the salvation of God.”

Thus I shall magnify Myself and demonstrate My greatness and sanctify Myself, and I will be recognized and will make Myself known in the sight of many nations; they will know [without any doubt] that I am the Lord.”’

It was to demonstrate His righteousness at the present time, so that He would be just and the One who justifies those who have faith in Jesus [and rely confidently on Him as Savior].

[and He did this] so that in the ages to come He might [clearly] show the immeasurable and unsurpassed riches of His grace in [His] kindness toward us in Christ Jesus [by providing for our redemption].