Government of the tongue is made the test of true religion by James.
"If any man among you seem to be religious, and bridleth not his tongue,
but deceiveth his own heart, this man's religion is vain. . . . For
in many things we offend all. If any man offend not in word, the
same is a perfect man, and able also to bridle the whole body:" Just
as a doctor looks at the tongue and can tell the condition of the
bodily health, so a man's words are an index of what is within. Truth
will spring from a good heart: falsehood and deceit from a corrupt
heart. When Ananias kept back part of the price of the land, Peter
asked him--"Why hath Satan filled thine heart to lie unto the Holy
Ghost?" Satan is the father of lies and the promoter of lies: