It is more full of deceit than any other object. We sometimes call the sea deceitful. But the heart is deceitful above all things more treacherous than the treacherous sea. The clouds are often very deceitful. But the heart is deceitful above all things.
Many animals are deceitful.
But the natural heart is more deceitful than a serpent above all things. It is deceitful in two ways in deceiving others and itself. In deceiving others. Every natural man is a hypocrite. He is different in reality from what he appears to be.