"Strategy requires thought, tactics require observation."

"The philosophy behind much advertising is based on the old observation that every man is really two men - the man he …"

"If a tree falls in a forest, and no-one is around to hear it, does it make a noise?"

"Whether if soul did not exist time would exist or not, is a question that may fairly be asked; for if there cannot be…"

"A pinch of observation is worth a mountain of hypothesis."

"The great extension of our experience in recent years has brought light to the insufficiency of our simple mechanical…"

"Perceptual reality is different for different species. In certain species it is a mode of observation, so what we cal…"

"Words, as is well known, are the great foes of reality. I have been for many years a teacher of languages. It is an o…"

"Science is the observation of things possible, whether present or past; prescience is the knowledge of things which m…"

"To me, photography is an art of observation. It's about finding something interesting in an ordinary place... I've fo…"