A Man came into a Wood one day with an axe in his hand, and begged all the Trees to give him a small branch which he wanted for a particular purpose. The Trees were good-natured and gave him one of their branches. What did the Man do but fix it into the axe head, and soon set to work cutting down tree after tree. Then the Trees saw how foolish they had been in giving their enemy the means of destroying themselves.
Aesop’s fables
It is ourselves who allow another to frustrate or anger us. Don’t give them the branch for their axe, and they will be unable to harm you.
FragmentsOfragments 
Another lesson is to be invisible but influential like the wind.
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