When a Holy Ghost baptized born again believer prays in tongues for a situation or for an individual, the praying believer relies on the Holy Ghost instead of their own understanding regarding whatever the believer is praying about. Why rely on the Holy Ghost instead of one's own insight and understanding regarding the subject or reason for the prayer? ANSWER: One's own insight and understanding regarding the matter might be WRONG! The believer praying regarding the matter may be misinformed. God knows the TRUTH about the matter. He will address the matter correctly and appropriately when the believer allows the Holy Ghost to pray through them in tongues (also called The Prayer Language).
"In the same way the Spirit comes to us and helps us in our weakness. We do not know what prayer to offer or how to offer it as we should but the Spirit Himself knows our need and at the right time intercedes on our behalf with sighs and groanings too deep for words." Romans 8:26 Amplified
"But you, beloved, build yourselves up on the foundation of your most holy faith continually progress, rise like an edifice higher and higher, pray in the Holy Spirit and keep yourselves in the love of God, waiting anxiously and looking forward to the mercy of our Lord Jesus Christ which will bring you to eternal life." Jude 20-21 Amplified
In Christ Jesus...faith works through love." (Galatians 5:6)