The most ordinary things are to philosophy a source of insoluble puzzles. With infinite ingenuity it constructs a concept of space or time and then f…

- Ludwig Boltzmann

The life contest is primarily a competition for available energy.

- Ludwig Boltzmann

The general struggle for existence of animate beings is not a struggle for raw materials, these for organisms are air water & soil, all abundantly av…

- Ludwig Boltzmann

Available energy is the main object at stake in the struggle for existence and the evolution of the world.

- Ludwig Boltzmann

It must be splendid to command millions of people in great national ventures, to lead a hundred thousand to victory in battle. But it seems to me gre…

- Ludwig Boltzmann

Which is more remarkable fact about America: that millionaires are idealists or idealists become millionaires.

- Ludwig Boltzmann

Since a given system can never of its own accord go over into another equally probable state but into a more probable one, it is likewise impossible …

- Ludwig Boltzmann

Bring forward what is true, Write it so that it is clear, Defend it to your last breath!

- Ludwig Boltzmann

Thermodynamics, correctly interpreted, does not just allow Darwinian evolution; it favors it.

- Ludwig Boltzmann