3 Quotes by Henri Lebesgue

Réduites à des théories générales, les mathématiques seraient une belle forme sans contenu.Reduced to general theories, mathematics would be a beautiful form without content.

The only teaching that a professor can give, in my opinion, is that of thinking in front of his students.

In my opinion a mathematician, in so far as he is a mathematician, need not preoccupy himself with philosophy-an opinion, moreover, which has been expressed by many philosophers.