Zechariah 14:4 says, “And his feet shall stand in that day upon the mount of Olives, which [is] before Jerusalem on the east, and the mount of Olives shall cleave in the midst thereof toward the east and toward the west, [and there shall be] a very great valley; and half of the mountain shall remove toward the north, and half of it toward the south.”The Mt of Olives has not been split in half. So visible proof that Zechariah 14:2-5 is still future.
The prophets frequently intermixed literal and figurative language all the time. That makes it difficult to dissect. Even in the midst of the most literal of passages in the Bible, mountains are repeatedly used to impress deep spiritual truths. The predicted mountain moving ministry of John the Baptist is a case-in-point. The result of the cross saw the Gospel go out to both Jew and Gentile alike. The scope of the cross-work reached far-and-wide.
Luke 3:4-5 records, speaking of that great forerunner of Christ – John the Baptist, “As it is written in the book of the words of Esaias the prophet (in Isaiah 40:3-5), saying, The voice of one crying in the wilderness, Prepare ye the way of the Lord, make his paths straight. Every valley shall be filled, and every mountain and hill shall be brought low; and the crooked shall be made straight, and the rough ways shall be made smooth.”
Did John literally and personally flatten every mountain and fill every valley that he encountered? No, like Zachariah 14, this is figurative language depicting the earth-shattering impact the truth had upon this globe.
John 4:10, 14: "Jesus answered and said unto her, If thou knewest the gift of God, and who it is that saith to thee, Give me to drink; thou wouldest have asked of him, and he would have given thee living water ... But whosoever drinketh of the water that I shall give him shall never thirst; but the water that I shall give him shall be in him a well of water springing up into everlasting life."
The living waters is the Holy Spirit. The former sea represents Old Testament Israel and the hinder sea represents the overwhelmingly Gentile New Testament Church. It figuratively represents the Gospel going out to the Jews and the Gentiles through the power of the Holy Spirit.