Those who know how to think need no teachers.

Those who know how to think need no teachers.

The most courageous act is still to think for yourself.

The most courageous act is still to think for yourself.

Thinking is more interesting than knowing, but less interesting than looking

Thinking is more interesting than knowing, but less interesting than looking

The difficulty of literature is not to write, but to write what you mean

The difficulty of literature is not to write, but to write what you mean

We shall require a substantially new manner of thinking if
mankind is to survive.

We shall require a substantially new manner of thinking if
mankind is to survive.

Sometimes people mistake the way I talk for what I am thinking.

Sometimes people mistake the way I talk for what I am thinking.

The 'how' thinker gets problems solved effectively because he wastes no time with futile 'ifs'.

The 'how' thinker gets problems solved effectively because he wastes no time with futile 'ifs'.

The open mind never acts: when we have done our utmost to arrive
at a reasonable conclusion, we still. read more

The open mind never acts: when we have done our utmost to arrive
at a reasonable conclusion, we still. . . must close our minds
for the moment with a snap, and act dogmatically on our
conclusions.

I have always believed that writing advertisements is the second most profitable form of writing. The first, of course, is read more

I have always believed that writing advertisements is the second most profitable form of writing. The first, of course, is ransom notes...