To be harmful with what is best in us.— At times, our strengths propel us so far forward that we can no longer endure our weaknesses and perish from them. We may even foresee this outcome without wishing to have it otherwise. Thus we become hard against everything in us that desires consideration, and our greatness is also our lack of compassion.
Such an experience, for which we must pay in the end with our lives, is a parable for the whole effect of great human beings on others and on their age: precisely with what is best in them, with what only they can do, they destroy many who are weak, unsure, still in the process of becoming, of striving; and thus they are harmful. It can even happen that, everything considered they are only harmful because what is best in them is accepted and absorbed by those alone whom it affects like a drink that is too strong: they lose their understanding and their selfishness and become so intoxicated that they are bound to break their limbs on all the false paths on which their intoxication leads them astray.
—Friedrich Nietzsche, The Gay Science, Aph. 28