The Wise man and The Scorpion
An old man saw a scorpion drowning and decided to pull it out from the water. He calmly extended his hand to reach the creature. When he did, the scorpion stung him. With the effect of the pain, the old man let go the creature and it fell back into the water. The man realizing that the scorpion was drowning again, got back and tried to rescue it but then again it stung him. He let go of it again.
A young boy standing by, approached the old man and said, "Excuse me Sir, you are going to hurt yourself trying to save the evil-vicious creature, why do you insist? Don't you realize that each time you try to help the scorpion, it stings you?"
The man replied, "The nature of the scorpion is to sting and mine is to help. My nature will not change in helping the scorpion."
So the man thought for a while and used a leaf from a nearby tree and pulled the scorpion out from the water and saved it's life.
Do not change your nature. If someone hurts you, just take precautions. Some pursue happiness while others create it. Let your conscience be your guide in whatever you do.