In about 1980 everything seemed to be falling apart around me. Sitting alone in my living room, I prayed a silent prayer to God/Jesus for salvation and guidance. Do you think God recognizes and accepts silent prayer for his saving grace, or at any other time when one prays?
Yes, God does hear silent prayers. A good example is in Genesis 24:42-28 where Abraham’s servant asked the Lord in his heart to show him the woman who would become Isaac’s wife. Another 1 Samuel 1:9-18 where Hannah was asking the Lord for a son. The Lord heard her prayer and she gave birth to Samuel. In gratitude she dedicated him to the Lord and he became one of Israel’s prophets (1 Samuel 3:20).
I can also attest to this from personal experience. Most of my prayers are silent ones, and I have seen so many obvious and immediate answers that I’ve lost count.