Nossas virtudes e nossos sentimentos são inseparáveis, assim como força e matéria. Quando se separam, o homem deixa de existir.

We crave for new sensations but soon become indifferent to them. The wonders of yesterday are today common occurrences

Life is and will ever remain an equation incapable of solution, but it contains certain known factors.

The harness of waterfalls is the most economical method known for drawing energy from the sun.

It is paradoxical, yet true, to say, that the more we know, the more ignorant we become in the absolute sense, for it is only through enlightenment that we become conscious of our limitations. Precisely one of the most gratifying results of intellectual evolution is the continuous opening up of new and greater prospects.

The spread of civilisation may be likened to a fire; first, a feeble spark, next a flickering flame, then a mighty blaze, ever increasing in speed and power.