"And he said, Unto you it is given to know the mysteries of the kingdom of God:"
I hear that, but when did the UNTO YOU know those mysteries?
Seems to me the "unto you's" were always asking
Mat 13:36 "........ Declare unto us the parable...."
Wasnt it much later on after the disciples grew in there knowledge as the Holy Spirit lead them to be Apostles, THEN, they began to know the mysteries of the kingdom. Just as we, now To day are growing the same way in our knowledge as the Holy Spirit reveals?
Yes it is ! Jesus come to give Spiritual healing eyes to see ears to hear and heart to understand what the Spirit is saying

I believe that is what the seals of the Book are opened up to do !
sealed in Daniel , that is the book given to Johns hand to open up by the Spirit of prophecy the same testimony revealed to us

to worship God in Spirit and truth
Rev 19:10 And I fell at his feet to worship him. And he said unto me, See [thou do it] not: I am thy fellowservant, and of thy brethren that have the testimony of Jesus: worship God: for the testimony of Jesus is the spirit of prophecy. ask , knock , seek and find , He is not very far from any of us ...Act 17:27 That they should seek the Lord, if haply they might feel after him, and find him, though he be not far from every one of us: His Spirit is poured out on all fleshfor all time