There is no such thing as a special category of science called applied science; there is science and its applications, which are related to one another as the fruit is related to the tree that has borne it.

It is surmounting difficulties that makes heroes.

Time is the best appraiser of scientific work, and I am aware that an industrial discovery rarely produces all its fruit in the hands of its first inventor.

Oh my goodness the mystery that has prompted my objective. My quality lies exclusively in my tirelessness.

Whether our efforts are, or not, favored by life, let us be able to say, when we come near to the great goal, I have done what I could.

Without theory, practice is but routine born of habit. Theory alone can bring forth and develop the spirit of inventions.

Science brings men nearer to God.