26. 이와 같이 성령도 우리의 연약함을 도우시나니 우리는 마땅히 기도할 바를 알지 못하나 오직 성령이 말할 수 없는 탄식으로 우리를 위하여 친히 간구하시느니라
26. In the same way, the Spirit helps us in our weakness. We do not know what we ought to pray for, but the Spirit himself intercedes for us through wordless groans.
27. 마음을 살피시는 이가 성령의 생각을 아시나니 이는 성령이 하나님의 뜻대로 성도를 위하여 간구하심이니라
27. And he who searches our hearts knows the mind of the Spirit, because the Spirit intercedes for God’s people in accordance with the will of God.
One of the biggest blessings and benefits of the Holy Spirit's dwelling within me is that He intercedes for me, so that I could do live in God's will, even in case I am on the fence about what I ask for and how I pray to Him.
Prayer is not just asking for my will to come true. Sadly, most people, even Christians, don't seem to know about what the prayer is and what we ask for like Jesus' deciples did. Only the Holy Spirit knows what and how I should ask for, because He (the Holy Spirit) intercedes with me for His sake, so I am convinced that I should know how and what to pray in the Holy Spirit.
Actually, i have never thought about this kind of prayer before i do the tongues, which was and is a wonderful experience. However, it doesn't mean 100% prayer in the Holy Spirit, although it is one of the signs, I believe.
The bottom line is that I should do pray in Him, not for my sake, but for His sake, which is prayer itself and I was called and adopted in order to do it. The glory of God, which is no comparable to anything or any honor that I can bear now and then.