observer quotes

If there was an observer on Mars, they would probably be amazed that we have survived this long.

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.

The universe as we know it is a joint product of the observer and the observed.

The philosophical question before us is, when we make an observation of our track in the past, does the result of our observation become real in the same sense that the final state would be defined if an outside observer were to make the observation?

There’s no way to remove the observer – us – from our perceptions of the world.