The observation of nature is part of an artist's life, it enlarges his form [and] knowledge, keeps him fresh and from working only by formula, and feeds inspiration.

Every young girl should have the opportunity of learning out-of-doors by first-hand observation, the wonders and loveliness nature has spread so lavishly-and how it grows.

Science is simply common sense at its best - that is, rigidly accurate in observation, and merciless to fallacy in logic

It has been my observation that most people get ahead during the time that others waste.

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

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