One must talk about everything according to its nature, how it comes to be and how it grows. Men have talked about the world without paying attention to the world of their own minds, as if they were asleep or absent-minded.

Heraclitus

Heraclitus

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There is a continuum which starts with direct sensory observations and proceeds to enormously complex, indirect methods of observation.

— Rudolf Carnap

For an item that has been continued for more than three years, any observation on what might happen in the future is pure speculation.

— Bob Pederson

One who is too wise an observer of the business of others, like one who is too curious in observing the labor of bees, will often be stung for his curiosity.

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