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Once you learn to look at architecture not merely as an art more or less well or more or less badly done, but as a social manifestation, the critical eye becomes clairvoyant.

I have a critical nature, in the sense that when I look at something I often look for the flaws.

A weak mind is like a microscope, which magnifies trifling things, but cannot receive great ones.

Efforts to develop critical thinking falter in practice because too many professors still lecture to passive audiences instead of challenging students to apply what they have learned to new questions.

Fortunately, I've never had to be too critical of my own work, because the world is critical enough.

By immersing ourselves with our consciousness in a supersensible world, we now learn a new kind of thinking, a new life of mental pictures, one that is not dependent on the nervous system in the way ordinary thinking is. We know that previously we have had to make use of our nervous system, but now we no longer need our brain.

Concentration is the ability to think about absolutely nothing when it is absolutely necessary.

Like water which can clearly mirror the sky and the trees only so long as its surface is undisturbed, the mind can only reflect the true image of the Self when it is tranquil and wholly relaxed.

It is much easier to be critical than to be correct.

Although professors regard improving critical thinking as the most important goal of college, tests reveal that seniors who began their studies with average critical thinking skills have progressed only from the 50th percentile of entering freshmen to about the 69th percentile.