The air we breathe is made up of four elements, at least: oxygen, nitrogen, carbonic acid gas, and knowledge.


Over the Teacups (1891)

Oliver Wendell Holmes Quotes

The air we breathe is made up of four elements, at least: oxygen, nitrogen, carbonic acid gas, and knowledge.

The air we breathe is made up of four elements, at least: oxygen, nitrogen, carbonic acid gas, and knowledge.

The air we breathe is made up of four elements, at least: oxygen, nitrogen, carbonic acid gas, and knowledge.

The air we breathe is made up of four elements, at least: oxygen, nitrogen, carbonic acid gas, and knowledge.