The very act of observing disturbs the system.

After the conversations about Indian philosophy, some of the ideas of Quantum Physics that had seemed so crazy suddenly made much more sense.

It was about three o'clock at night when the final result of the calculation [which gave birth to quantum mechanics] lay before me ... At first I was deeply shaken ... I was so excited that I could not think of sleep. So I left the house ... and awaited the sunrise on top of a rock.

Even for the physicist the description in plain language will be a criterion of the degree of understanding that has been reached.

What we observe is not nature itself, but nature exposed to our method of questioning.

The Same organizing forces that have shaped nature in all her forms are also responsible for the structure of our minds.

Looking at something changes it.