It is perplexing to see the flexibility of the so-called 'exact sciences' which by cast-iron laws of logic and by the infallible help of mathematics can lead to conclusions which are diametrically opposite to one another.

The world has found lenses on its nose without knowing whom to thank

It is perplexing to see the flexibility of the so-called 'exact sciences' which by cast-iron laws of logic and by the infallible help of mathematics can lead to conclusions which are diametrically opposite to one another.

The apparent world, the one which is perceived, with its figures, its brightness, its colors, is a psychical product, a creation of the observer. The figures seen on the vault of heaven are neither the celestial bodies, nor the true clouds or the falling stars, but are only effigies which the observer's psyche has created and localized how and where it can.