One who observes, or pays attention to, anything; especially, one engaged in, or trained to habits of, close and exact observation; as, an astronomical observer.
One who keeps any law, custom, regulation, rite, etc.; one who conforms to anything in practice.
One who fulfills or performs; as, an observer of his promises.
A person who is too nice an observer of the business of the crowd, like one who is too curious in observing the labor of bees, will often be stung for his curiosity. Alexander Pope
The observer, when he seems to himself to be observing a stone, is really, if physics is to be believed, observing the effects of the stone upon himself. Bertrand Russell
The universe as we know it is a joint product of the observer and the observed. Pierre Teilhard de Chardin
If there was an observer on Mars, they would probably be amazed that we have survived this long. Noam Chomsky
The physical world, including our bodies, is a response of the observer. We create our bodies as we create the experience of our world. Deepak Chopra
