Nicodemus came to Christ in the dark, and Christ taught him the same way He taught others. There are some sources which suggest Nicodemus was ultimately converted. If he was, there is little doubt that after his conversion, the spiritual life he had as one of the Lord's disciples was greater than that of a member of the Sanhedrin. The Lord was not unwilling to share with the Sanhedrin, but they were unwilling to receive Him. When one (Nicodemus) changed his heart, the Lord came to him.
This seething distrust and accusation of any who claim to experience the miraculous leads in turn to denouncing the gifts of God. When denounced, such gifts depart from us. We no longer hear about miracles, healings, visions, tongues, visitations, or other gifts experienced by those we read of in scripture. Therefore, when the presence of the gifts end, the record of scriptures ends. There is nothing to add, and so nothing is added.
Eventually the end of this spiritual journey into the dark is to denounce all things coming from the "hand of God." No "miracle wrought by the hand of God" will be acknowledged, but will be denounced instead. The position becomes unalterable: "God is not a God of miracles anymore." You must trust leaders and leadership. You will be deceived if you profess revelation or the miraculous. And so the approach into hell is carefully laid by argument, emotion and fear.
Nephi foresaw this. He is warning us against it. We should not be seduced into thinking God has finished His work. He hasn't. He is in the middle of fulfilling promises made generations ago to the "fathers." We inherit from the Lord the promises He made to them. Now is a great day of miracles, visits, visitations, dreams, and healings. The heavens are open, if you will ask with a sincere heart having real intent, He will manifest the truth unto you. God remains the same. His blessings remain predicated upon the same conditions.
Seek. Ask. Knock. It will all be unfolded to you. He is no respecter of persons.