1st Peter 1:19 We have also a more-sure word of prophecy; whereunto ye do well that ye take heed, as unto a light that shines in a dark place, until the day dawn, and the day star arise in your hearts.
Those utterances, written in the Old Testament are immutable facts, certified by The Holy Spirit, and which cannot be gainsaid, except at a great peril to those who choose to go that route. For instance, after the resurrection of Christ, two of His disciples were walking to a certain place, and as they talked together, their utter discouragement with what had recently transpired at Jerusalem was palpable, for they all but gave up on Jesus being the Messiah.
Thus, to address this problem, Christ joined them unannounced, and spoke to them extensively from the Old Testament, beginning with Moses’ writings, and then on to the other prophets, showing that the things which had just taken place was actually predicted in the scriptures. When passages of scripture pertaining to Jesus are correctly tied together as an indivisible whole, then a completely different picture emerges, and things which previously seemed vague become plain.
Not only did Moses write extensively concerning Christ; but all of the other major, and minor prophets wrote about some aspect of His life, His ministry, His death, and His second and third coming. In the Old Testament these references aren’t always readily apparent, for some are written into laws, as can be observed in the sacrifices ordained for the priesthood and the people.
Luke 24:27 And beginning at Moses and all the prophets, he expounded unto them in all the scriptures the things concerning himself.
May The Lord add His blessing to the study of His word. God bless!