We must come within the understanding distance."There is a distance, which is properly called the speaking distance, or the hearing distance; beyond which the voice reaches not, and the ears hear not. To hear another, we must come with that circle which the voice audibly fills.
"Now we may with propriety say, that as it respects God, there is an understanding distance. All beyond that distance can not understand God; all within it can easily understand him in all matters of piety and morality. God himself is the center of that circle, and humility is its circumference."
Alexander Campbell, The Christian System, Gospel Advocate Company (2001); p. 5