Matthew 2:13–18 (CSB)
13 After they were gone, an angel of the Lord appeared to Joseph in a dream, saying, “Get up! Take the child and his mother, flee to Egypt, and stay there until I tell you. For Herod is about to search for the child to kill him.”
14 So he got up, took the child and his mother during the night, and escaped to Egypt.
15 He stayed there until Herod’s death, so that what was spoken by the Lord through the prophet might be fulfilled: Out of Egypt I called my Son.
16 Then Herod, when he realized that he had been outwitted by the wise men, flew into a rage. He gave orders to massacre all the boys in and around Bethlehem who were two years old and under, in keeping with the time he had learned from the wise men.
17 Then what was spoken through Jeremiah the prophet was fulfilled:
18 A voice was heard in Ramah, weeping, and great mourning, Rachel weeping for her children; and she refused to be consoled, because they are no more.
John 10:14-18 (CSB) “I am the good shepherd. I know my own, and my own know me, just as the Father knows me, and I know the Father. I lay down my life for the sheep. But I have other sheep that are not from this sheep pen; I must bring them also, and they will listen to my voice. Then there will be one flock, one shepherd. This is why the Father loves me, because I lay down my life so that I may take it up again. No one takes it from me, but I lay it down on my own. I have the right to lay it down, and I have the right to take it up again. I have received this command from my Father.”
Matthew 26:52-54 (CSB) Then Jesus told him, “Put your sword back in its place because all who take up the sword will perish by the sword. Or do you think that I cannot call on my Father, and he will provide me here and now with more than twelve legions of angels? How, then, would the Scriptures be fulfilled that say it must happen this way?
One of the things that we might have a hard time comprehending is the eternal word of God. When we speak about something we want to do, we say it, then do it, and then it will be true.
God does not operate in that way.
What He says, in any moment of time, is true not only for the moment it was spoken and forever in the future but any moment prior to that moment.
Think of all the Old Testament saints--by definition, these are all the saints prior to the cross of Christ. How were they saved? How were all the believing Jews were saved?
Genesis 3:15 (CSB) I will put hostility between you and the woman, and between your offspring and her offspring. He will strike your head, and you will strike his heel.
This first instance of the gospel was given to our first parents: Adam and Eve. From that moment, God does not change it but builds on the promise--the promise that He will make it everything right.
The fullness of the gospel was not completed until Jesus died on the cross. But the details of the gospel did not have to be realized by any of the Old Testament saints.
Romans 3:25-26 (CSB) od presented him as the mercy seat by his blood, through faith, to demonstrate his righteousness, because in his restraint God passed over the sins previously committed. God presented him to demonstrate his righteousness at the present time, so that he would be just and justify the one who has faith in Jesus.
Jesus Christ, Son of God who is God, is the Word Eternal. When God speaks, it is true, will always be true, and was forever true from before the beginning.