Off the top of my head I'm fairly certain both audible and and non-audible calling or prayer is referenced in scripture. Regardless of how you go about calling it all stems from a single source, your heart, which is something God searches out to see if it matches your words (audible or inaudible). And as my previous post tried to indicate I think too it's extremely important to know who to call upon for salvation. In the Tanach Yehovah my God personally instructs me to return and call upon His name for salvation. Paul on the other hand is attempting to divert me away from that and to call upon another name, which is something I just cannot do.
I respect your input but Paul was a Pharisee and an Israelite from the tribe of Benjamin. He was very well acquainted with the Torah and the Tanach. I have never read any diversion in what he ever wrote.
Here is a relationship of Paul to the Torah.
"But if you call yourself a Jew and rest on Torah and boast about God and know his will and give your approval to what is right, because you have been instructed from the Torah; and if you have persuaded yourself that you are a guide to the blind, a light in the darkness, an instructor for the spiritually unaware and a teacher of children, since in the Torah you have the embodiment of knowledge and truth; then, you who teach others, don't you teach yourself? Preaching, "Thou shalt not steal,"do you steal? Saying, "Thou shalt not commit adultery," do you commit adultery? Detesting idols, do you commit idolatrous acts? You who take such pride in Torah, do you, by disobeying the Torah, dishonor God? - as it says in the Tanakh, "For it is because of you that God's name is blasphemed by the Goyim."For circumcision is indeed of value if you do what Torah says. But if you are a transgressor of Torah, your circumcision has become uncircumcision! Therefore, if an uncircumcised man keeps the righteous requirements of the Torah, won't his uncircumcision be counted as circumcision? (Romans 2:17-26)
Exodus 20:13 and Deuteronomy 5:17 "Do not murder."
Isaiah 52:5 So now, what should I do here," asks ADONAI, "since my people were carried off for nothing? Their oppressors are howling," says ADONAI, "and my name is always being insulted, daily.
Ezekiel 36:20 When they came to the nations they were going to, they profaned my holy name; so that people said of them, 'These are ADONAI's people, who have been exiled from his land.'
Deuteronomy 10:16 Therefore, circumcise the foreskin of your heart; and don't be stiffnecked any longer!