Originally Posted by W.J. Wilczek

We fear what we don’t know, and hate what we do - if only out of contempt for what is familiar. To master one’s antipathies requires courage and conviction. However, both must be employed with common sense, for to be bold in the face of unknown danger is not brave but foolhardy, and to persist in despising what is shown to be good is not to be steadfast in one’s convictions but rather mean and stupid.