Physics is experience, arranged in economical order.

Ernst Mach

Science always has its origin in the adaptation of thought to some definite field of experience.

Ernst Mach

Ordinarily pleasure and pain are regarded as different from sensations.

Ernst Mach

A colour is a physical object as soon as we consider its dependence, for instance, upon its luminous source, upon other colours, upon temperatures, upon spaces, and so forth.

Ernst Mach

When I recall today my early youth, I should take the boy that I then was, with the exception of a few individual features, for a different person, were it not for the existence of the chain of memories.

Ernst Mach

The task which we have set ourselves is simply to show why and for what purpose we hold that standpoint during most of our lives, and why and for what purpose we are provisionally obliged to abandon it.

Ernst Mach

The ego is as little absolutely permanent as are bodies.

Ernst Mach

If our dreams were more regular, more connected, more stable, they would also have more practical importance for us.

Ernst Mach

The biological task of science is to provide the fully developed human individual with as perfect a means of orientating himself as possible. No other scientific ideal can be realised, and any other must be meaningless.

Ernst Mach

My table is now brightly, now dimly lighted. Its temperature varies. It may receive an ink stain. One of its legs may be broken. It may be repaired, polished, and replaced part by part. But, for me, it remains the table at which I daily write.

Ernst Mach

The presentations and conceptions of the average man of the world are formed and dominated, not by the full and pure desire for knowledge as an end in itself, but by the struggle to adapt himself favourably to the conditions of life.

Ernst Mach

Man is pre-eminently endowed with the power of voluntarily and consciously determining his own point of view.

Ernst Mach