Matthew 12:34b For out of the overflow of the heart the mouth speaks. 35The good man brings good things out of the good stored up in him, and the evil man brings evil things out of the evil stored up in him. 36But I tell you that men will have to give account on the day of judgment for every careless word they have spoken. 37For by your words you will be acquitted, and by your words you will be condemned.”

Psalm 51:10 Create in me a pure heart, O God, and renew a steadfast spirit within me.

Our words have so much power.  Whether we speak negative, crude, or profane language,  or if we choose to speak life, we are held responsible for our words.  But, our speech is merely a product of what we put in our hearts.  So, we intentionally choose to expose ourselves to godly experiences (positive words, thoughts, images) and the fruit is produced will reflect the condition of our hearts.