Proverbs 15:28 The heart of the righteous studieth to answer: but the mouth of the wicked poureth out evil things.
Luke 6:45 says, "A good man out of the good treasure of his heart bringeth forth that which is good; and an evil man out of the evil treasure of his heart bringeth forth that which is evil: for of the abundance of the heart his mouth speaketh." (KJV)
Our hearts, and any moment, can be filled with good or evil. - And in most moments is probably filled with some of both. Led by the Spirit of God, along with a dose of surrender and grace, we are able to speak the good things and live from that storehouse, rather than the footholds of sin and wickedness. Take time in relating to others, and invite the Holy Spirit to intercede.