Matthew 12:34
You brood of snakes! how can you, bad as you are, utter anything good? For the mouth says only what the heart is full of.
John 4:14
but anyone who drinks the water that I will give him will never be thirsty, but the water that I will give him will become a spring of water within him, bubbling up for eternal life."
John 7:38-39
If anyone believes in me, streams of living water, as the Scripture says, shall flow forth from his heart."
Colossians 3:16
Let the message of Christ live in your hearts in all its wealth of wisdom. Teach it to one another and train one another in it with thankfulness, with psalms, hymns, and sacred songs, and sing to God with all your hearts.
Colossians 4:6
Always put your message attractively, and yet pointedly, and be prepared to give every inquirer a fitting answer.