Knowledge is power. The real test of knowledge is not whether it is true but whether it empowers us. Scientists usually assume that no theory is 100% correct. Truth, consequently, is a poor test for knowledge. The real test is utility. A theory that enables us to do new things constitutes knowledge.

Prediction, not narration, is the real test of our understanding of the world.

If you can’t show that it’s true, then you can’t call it truth. Knowledge is similar to truth in that it a justified belief. Knowledge is demonstrable and testable with measurable accuracy. If you can’t demonstrate your knowledge to any degree at all by any means whatsoever then you don’t actually know what you think you do, no matter how convinced of it you are. Without evidentiary support, then it is only an empty assertion unworthy of serious consideration.

Each piece, or part, of the whole of nature is always merely an approximation to the complete truth, or the complete truth so far as we know it. In fact, everything we know is only some kind of approximation, because we know that we do not know all the laws as yet. Therefore, things must be learned only to be unlearned again or, more likely, to be corrected. ... The test of all knowledge is experiment. Experiment is the sole judge of scientific “truth”.

To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.

The ultimate test of your knowledge is your capacity to convey it to another.

The true test of intelligence is not how much we know how to do, but how we behave when we don't know what to do

The true method of knowledge is experiment.

real knowledge, true knowledge, comes from knowing why.

Real knowledge is to know the extent of one's ignorance.

Relationships are the real test of whether we actually understand ourselves better.

If knowledge is power, knowing what we don’t know is wisdom.

Our test of truth is a reference to either a present or an imagined future majority in favor of our view.

It is not truth that is validated by a proof, but one’s understanding of it.