"The good person out of the good treasure of his heart produces good, and the evil person out of his evil treasure produces evil, for out of the abundance of the heart his mouth speaks" Luke 6:45

Responding to God with thoughts, words, and deeds that magnify His glory allows our heart to overflow with His great love and abundant grace. True love for the Lord and obedience to Him is reflected when His Word controls ours. If we taste our words before we speak, controlling our tongues, we can encourage, up lift, honor, and affirm others (Proverbs 15:28).

From the depths of your heart radiates truth. The beauty of a soul tuned to the Lord is reflected in the words. Let your heart reflect Jesus and the inward changes He has made in you and rivers of living water will flow out to others (John 7:38). Speak truth, life, forgiveness, compassion, and love; always being mindful of the tongue's ability to wound or heal (Proverbs 12:18).

The following article by Jon Bloom offers a look at the "life and death" properties of the words we choose:

The Bible tells us “death and life are in the power of the tongue” (Proverbs 18:21). That means a lot is at stake in what we say today. And in literate societies like ours, tongues include hands that write, type, paint, or sign...

Continue reading here: Make Your Mouth a Fountain of Life | Desiring God