A man’s heart is a habitat that falls under the pressure of various temptations in which our fleshly desires beget all sorts of transgressions. The main characteristic of lust is found in impatience and the instant gratification of passions through their manifestation in words or actions. Thus to remain silent, to bridle your tongue, creates a closed space for the raging lusts, and they burn out.
“…If anyone does not stumble in word, he is a perfect man, able also to bridle the whole body.” (James 3:2 NKJV)
“Do not let your mouth cause your flesh to sin, nor say before the messenger of God that it was an error. Why should God be angry at your excuse and destroy the work of your hands?” (Ecclesiastes 5:6 NKJV)