You can know a tree by the fruit it bears. No good tree bears bad fruit, and no bad tree bears good fruit. You don’t find figs on a thorn bush, and you can’t pick grapes from a briar bush. It’s the same with people. A person full of goodness in his heart produces good things; a person with an evil reservoir in his heart pours out evil things. The heart overflows in the words a person speaks; your words reveal what’s within your heart. Luke 6:43-45 The Voice Bible Translation

The heart is the metal of the bell, the tongue is the clapper. George Swinnock (1627 – 1673), English clergyman and nonconformist.