Learning Torah also rectifies the sin of forbidden speech, as our Sages taught, what should people who speak evil do to rectify [their past actions after refraining from speaking in the future]? If he is a Torah scholar he should study Torah, as it states, ‘The tree of life heals the tongue’, and the tree of life refers to the Torah, as it states, ‘[The Torah] is a tree of life for those who cleave to it’. Learning Torah also helps prevent a person from speaking evil, because people were given the natural tendency to speak all the time to enable them to learn Torah, but if he doesn’t use his mouth for the purpose it was created for, he will inevitably speak forbidden speech. This reason is sufficient for a person to learn Torah constantly, to avoid the pitfalls of forbidden speech.