Fernando Pessoa said this quote

The Complete Work is essentially dramatic, thought it takes different forms - prose passages in this first volume, poems and philosophies in other volumes. It's the product of the temperament I've been blessed or cursed with - I'm not sure which. All I know is that the author of these lines (I'm not sure if also of these books) has never had just one personality, and has never thought or felt except dramatically - that is, through invented persons, or personalities, who are more capable than he of feeling what's to be felt.