The man who does not do his own thinking is a slave, and is a traitor to himself and to his fellow-men.
Robert Green IngersollIf priests had not been fond of mutton, lambs never would have been sacrified to god. Nothing was ever carried to the temple that the priest could not use, and it always happened that god wanted what his agents liked.
Robert Green IngersollTo the wise man, to the wise nation, the mistakes of the past are the torches of the present.
Robert Green IngersollI would have all the professors in colleges, all the teachers in schools of every kind, including those in Sunday schools, agree that they would teach only what they know, that they would not palm off guesses as demonstrated truths.
Robert Green IngersollThe only reason why we wish to exchange thoughts is that we are different. If we were all the same, we would die dumb. No thought would be expressed after we found that our thoughts were precisely alike. We differ-our thoughts are different. Therefore the commerse that we call conversation.
Robert Green Ingersoll