John 16:25-26 "These things I have spoken to you in figurative language; but the time is coming when I will no longer speak to you in figurative language, but I will tell you plainly about the Father. In that day you will ask in My name, and I do not say to you that I shall pray the Father for you;"
For His disciples to be able to have a good understanding of His parables, teachings, words, etc. they must be baptized by Him with the Holy Spirit so that the Holy Spirit becomes the Helper or Spirit of truth.
Act 1:5 "for John truly baptized with water, but you shall be baptized with the Holy Spirit not many days from now.”
When we are baptized with water by the Church leader or pastor, he will immersed us into the water. Similarly, when our Lord Jesus baptizes us with the Holy Spirit, He will immerse our spirits in the Holy Spirit, Who being the Helper and the Spirit of truth will teach us all things and guide us into all truth.
John 14:26 "But the Helper, the Holy Spirit, whom the Father will send in My name, He will teach you all things, and bring to your remembrance all things that I said to you."
John 16:26 In that day you will ask in My name, and I do not say to you that I shall pray the Father for you;"
In that day (after His disciples had understood all things esp. His words, teachings, plans, ways, will, etc. and had known all truth) when His enlightened disciples prayed in the Name of Jesus, our Lord will not pray for them for there is something better awaiting these special, matured Christians.
Rom 8:34-35 Who is he who condemns? It is Christ who died, and furthermore is also risen, who is even at the right hand of God, who also makes intercession for us. Who shall separate us from the love of Christ? Shall tribulation, or distress, or persecution, or famine, or nakedness, or peril, or sword?
But for the rest of the Christians who are still immature, whenever we prayed in Jesus' Name, our Lord Himself will study whatever we ask in His name. If our requests are beneficial to us and for our good in our walk with Him, then He will intercede the Father for us. But if our requests are for earthly rewards, blessings, healings, etc. which will make us proud, worldly, covetous, sinful, abominable, etc. and leading us to destruction, He will not intercede the Father because He loves us.
Mat 7:9-1 "Or what man is there among you who, if his son asks for bread, will give him a stone? Or if he asks for a fish, will he give him a serpent? If you then, being evil, know how to give good gifts to your children, how much more will your Father who is in heaven give good things to those who ask Him!"
Brethren, our Father in heaven is waiting to give us good gifts that will help us to be transformed into the image of His Son Jesus Christ so that we may become the bride of the Lamb if only we ask in Jesus' name.