“Doubt is thus the space between reality and the application of an idea. It ought to be given over to the weighing of experience, intuition, creativity, ethics, common sense, reason and, of course, knowledge, in balanced consideration of what is to be done. The longer this stage lasts the more we take advantage of our intelligence.”

“What we firmly believe, if it is true, is called knowledge, provided it is either intuitive or inferred (logically or psychologically) from intuitive knowledge from which it follows logically. What we firmly believe, if it is not true, is called error. What we firmly believe, if it is neither knowledge nor error, and also what we believe hesitatingly, because it is, or is derived from, something which has not the highest degree of self-evidence, may be called probable opinion. Thus the greater part of what would commonly pass as knowledge is more or less probable opinion.”

“What it takes to do a job will not be learned from management courses. It is principally a matter of experience, the proper attitude, and common sense — none of which can be taught in a classroom... Human experience shows that people, not organizations or management systems, get things done.”

“Every human being relies on and is bounded by his knowledge and experience to live. This is what we call “reality”. However, knowledge and experience are ambiguous, thus reality can become illusion. Is it not possible to think that, all human beings are living in their assumptions?”

“although we very clearly see the sun, we ought not therefore to determine that it is only of the size which our sense of sight presents; and we may very distinctly imagine the head of a lion joined to the body of a goat, without being therefore shut up to the conclusion that a chimaera exists; for it is not a dictate of reason that what we thus see or imagine is in reality existent; but it plainly tells us that all our ideas or notions contain in them some truth.”

“Ideas first and last: yet it is not till these are formulated and utilized that the devotees of the common sense discern their value and advantages. The idealist is the capitalist on whose resources multitudes are maintained life long. Ideas in the head set hands about their several tasks, thus carrying forward all human endeavors to their issues.”