Strengthen your wholesome thoughts

Instead of worrying over past unwholesome thoughts, we arouse wholesome thoughts, such as generosity, patience, and loving-friendliness and use effort to strengthen the wholesome thoughts. In addition, we use mindfulness to guard the senses against external sensory experiences that might stimulate any unwholesome tendencies.

As we have said, mindfulness is in essence vipassana or insight meditation. Only insight meditation can train the mind to watch and discipline itself in order to purify it, eventually destroying all the defilements, including their latent tendencies.

Bhante Gunaratana – The Four Foundations of Mindfulness