Men can intoxicate themselves with ideas as effectually as with alcohol or with bang and produce, be dint of serious thinking, mental conditions hardly distinguishable from monomania.
Thomas HuxleyOf moral purpose I see no trace in Nature. That is an article of exclusively human manufacture and very much to our credit.
Thomas HuxleyThere is no greater mistake than the hasty conclusion that opinions are worthless because they are badly argued.
Thomas HuxleyOnly one absolute certainty is possible to man, namely that at any given moment the feeling which he has exists.
Thomas Huxley