Snakes can bite venom into your body but they cannot suck the venom out of your body. Similarly there are a lot of things we as humans can do to others that could do irreversible damage and cannot be repaired. Physical hurt heals over time. Mental wounds linger for life-time. One cannot control what others say and how others behave but we have control over what we allow to sit in our mind.
As Marcus Aurelius in Meditations said,
“When you wake up in the morning, tell yourself: the people I deal with today will be meddling, ungrateful, arrogant, dishonest, jealous and surly. They are like this because they can’t tell good from evil. But I have seen the beauty of good, and the ugliness of evil, and have recognized that the wrongdoer has a nature related to my own – not of the same blood and birth, but the same mind, and possessing a share of the divine. And so none of them can hurt me. No one can implicate me in ugliness. Nor can I feel angry at my relative, or hate him. We were born to work together like feet, hands and eyes, like the two rows of teeth, upper and lower. To obstruct each other is unnatural. To feel anger at someone, to turn your back on him: these are unnatural.”
Do read the Disclaimer