Logic is the anatomy of thought. – John Locke
It is of great use to the sailor to know the length of his line, though he cannot with it fathom all the depths of the ocean. – John Locke

Logic is the anatomy of thought. – John Locke
It is of great use to the sailor to know the length of his line, though he cannot with it fathom all the depths of the ocean. – John Locke
When ideas float in our mind without any reflection or regard of the understanding, it is that which the French call revery, our language has scarce a name for it. – John Locke
Reading furnishes the mind only with materials of knowledge it is thinking that makes what we read ours. – John Locke