In Psalm 19: 13-14 David says,
13 Keep your servant also from willful sins;
may they not rule over me.
Then I will be blameless,
innocent of great transgression.
14 May these words of my mouth and this meditation of my heart
be pleasing in your sight,
Lord, my Rock and my Redeemer. NIV
Then, 1000 years later here’s what Jesus says about our words.
In Matthew 15: 10-20 Jesus responds to the Pharisees’ comments about his disciples not traditionally washing their hands before they ate.
10 Jesus called the crowd to him and said, “Listen and understand. 11 What goes into someone’s mouth does not defile them, but what comes out of their mouth, that is what defiles them.” Continue reading