“Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you,” wrote the philosopher Friedrich Nietzsche.
Therapists know well the risk of being pulled into the very darkness from which they labor to help their clients extract themselves.
On the brighter, flip side, we have the famous biblical sentiment from Saint Luke, "Give, and it will be given to you. A good measure, pressed down, shaken together and running over, will be poured into your lap.
Read more on psychologytoday.com