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

Invention is the most important product of man's creative brain. The ultimate purpose is the complete mastery of mind over the material world, the harnessing of human nature to human needs.

If Edison had a needle to find in a haystack, he would proceed at once with the diligence of the bee to examine straw after straw until he found the object of his search.I was a sorry witness of such doings, knowing that a little theory and calculation would have saved him ninety per cent of his labor.

The day science begins to study non-physical phenomena, it will make more progress in one decade than in all the previous centuries of its existence.

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