Jesus promised to send the Helper - to be with me forever. He is the Spirit of Truth. He "dwells with you and will be in you." (See John 14:15-17) Jesus says that "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 that I have said to you." (John 14:25-26) Later in John 16 Jesus actually says it is to our advantage that He go away, because if He didn't go away then the Holy Spirit would not come. John 15:13 says "when the Spirit of truth comes, he will guide you into all the truth, for he will not speak on his own authority, but whatever he hears he will speak, and he will declare to you the things that are to come. He will glorify me, for he will take what is mine and declare it to you."
No discussion of the Holy Spirit and prayer would be complete without Romans 8. Read the whole chapter! I have been thinking about 8:26-27. I take so much comfort in these verses. I am a woman who loves to pray but who can drive myself crazy over what exactly to pray about or how to pray. These verses calm my soul. The Spirit helps in my obvious weakness. He intercedes for me - with groanings too deep for words!! Can you even fathom this? I cannot. But I take comfort in this (and there again - He is my Comforter!). The Spirit prays for me. He intercedes for me according to the will of God!! The Spirit and the Father and the Son are One. They are of one mind. When the Spirit prays He knows the will of the Father. Each of His prayers are for something that the Father has already willed. Amazing!! All the times that I second guess whether I am asking for my will or the will of the Father - the Spirit, who intercedes for me, already knows the will of the Father and prays accordingly! And in the meantime, He is teaching me - reminding me of the Words of Christ - helping the Father to mold me into the image of Christ - into a person who desires the will of the Father! It is enough to make my head spin after a while. But what comfort is there in these thoughts!!
So, as I pray, the pressure is removed. I do desire to know and ask for the will of the Father. But it isn't up to me to determine the value of each request (although I am not exempt from seeking His will). The Spirit intercedes for me with the Father. The Spirit of Truth will teach me and remind me of what Jesus has said. He will guide me into all Truth and He will take what Jesus has said and declare it to me! What a blessing! I am again struck by how much of this process has NOTHING to do with me - and everything to do with the power of the Holy Spirit in me.