Logic will get you from A to B. Imagination will take you everywhere.
Contrariwise, if it was so, it might be; and if it were so, it would be; but as it isn’t, it ain’t. That’s logic.
Logic! Good gracious! What rubbish!
E. M. Forster
Against logic there is no armor like ignorance.
Laurence J. Peter
Logic teaches rules for presentation, not thinking.