A good person produces good things from the treasury of a good heart, and an evil person produces evil things from the treasury of an evil heart. What you say flows from what is in your heart.
Take a look at yourself. Look deep within and think hard. What are you producing? Look at the things that you have bore. The fruits you have sprung forth, what does it look like? What roots do those fruits have and in what grounds did they spring forth?
Our heart truly is the reflection of our real self. This however is something that most of us will deny. Reason being we are living a facade of a life. We are portraying one thing when are our heart speaks otherwise. Problem is our hearts cannot deceive others for too long. Eventually what is hidden within will begin to resurface, and others begin to see the filth of our hearts and the darkness within.
We can never play God for a fool. And even with man we may get away with deception here and there but eventually we will be exposed. This is because what is imbedded in our hearts is what get exposed. Our hearts knows to give off what is truly within. So if some foul languages “slip” out of your mouth on accident, check your heart and judge to see if truly it was accidental or if it was something already hidden in the core and depths of your heart.
The good heart produces what is good and the every heart produces what is evil. It is just that simple. Just as an apple cannot produce an orange and a strawberry cannot produce a banana so is the separation of the good and evil that comes from the heart. Check yourself and be honest with yourself, and remember that no matter the state of your heart you have the Creator who is able to fix all things if only you desire.