Utterance is more powerful than observation

It's been my observation that for the most part, students are doing the leading.

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.

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.

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.