भोधिचार्यावतार - दोष

विषं रुधिरमासाद्य प्रसर्पति यथा तनौ |
तथैव छिद्रमासाद्य दोषस्चित्ते प्रसर्पति ||

- भोधिचार्यावतार

Just like how poison spreads through the entire body with the help of blood, one bad quality (weakness) will spread through the entire mind using a single opportunity (a moment of weakness).

- Bhodhicharavatara