Words are power. And a book is full of words. Be careful what power you get from it. But know that you do.

When I speak out against the guns or against the big corporations, some of my friends say, 'Oh Yoko, be careful. These people have all the power.' But, you know, most people don't speak out because they are frightened.

What you say is what you become, be careful with your words

I realized that if my thoughts immediately affect my body, I should be careful about what I think. Now if I get angry, I ask myself why I feel that way. If I can find the source of my anger, I can turn that negative energy into something positive.

You got to be careful of the company you keep.

I don't have to be careful, I've got a gun.