"So too the Spirit comes to our aid and bears us up in our weakness; for we do not know what prayer to offer nor how to offer it worthily as we ought, but the Spirit Himself goes to meet our supplication and pleads in our behalf with unspeakable yearnings and groanings too deep for utterance." (Romans 8:26 AMP)
It is not necessary to maintain a conversation when we are in the presence of God. We can come into His presence and rest our weary souls in quiet contemplation of Him. Our groanings, which cannot be uttered, rise to Him and tell Him better than words how dependent we are upon Him.
-- O. Hallesby in Prayer