Stay at home in your mind. Don't recite other people's opinions. I hate quotations. Tell me what you know.

Opinions have vested interests just as men have.

Errors of opinion may be tolerated where reason is left free to combat it.

We accumulate our opinions at an age when our understanding is at its weakest.

The majority have no other reason for their opinions than that they are the fashion.

Don't be swayed just because they say it's public opinion. Remember, public opinion is simple what everybody else thinks.

Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.

A point of view can be a dangerous luxury when substituted for insight and understanding.

It is always brave to say what everyone thinks.

In my opinion a mathematician need not preoccupy himself with philosophy -- An opinion, moreover, which has been expressed by many philosophers.