The hardest part of gaining any new idea is sweeping out the false idea occupying that niche.

The hardest part of gaining any new idea is sweeping out the false idea occupying that niche.

Rudeness is the weak man's imitation of strength.

Rudeness is the weak man's imitation of strength.

Science does not give us absolute and final certainty. It only gives us assurance within the limits of our mental read more

Science does not give us absolute and final certainty. It only gives us assurance within the limits of our mental abilities and the prevailing state of scientific thought.

The easier it is to do, the harder it is to change.

The easier it is to do, the harder it is to change.

There are two modes of acquiring knowledge, namely by reasoning and experience. Reasoning draws a conclusion and makes us grant read more

There are two modes of acquiring knowledge, namely by reasoning and experience. Reasoning draws a conclusion and makes us grant the conclusion, but does not make the conclusion certain, nor does it remove doubt so that the mind may rest on the intuition of truth, unless the mind discovers it by the path of experience.

That's one small step for a man, one giant leap for mankind.

That's one small step for a man, one giant leap for mankind.

It is only doubt that creates. It is only the minority that counts.

It is only doubt that creates. It is only the minority that counts.

Brain-washing starts in the cradle.

Brain-washing starts in the cradle.

The psychologists and the metaphysicians wrangle endlessly over the nature of the thinking process in man, but no matter how read more

The psychologists and the metaphysicians wrangle endlessly over the nature of the thinking process in man, but no matter how violently they differ otherwise they all agree that it has little to do with logic and is not much conditioned by overt facts.