Notice: ob_end_flush(): Failed to delete and flush buffer. No buffer to delete or flush in /home1/ntptuqmy/public_html/quotes/includes/header_html.php on line 6 Avicenna Quotes - IQDb - Internet Quotes Database
Now it is established in the sciences that no knowledge is acquired save through the study of its causes and beginnings, if it has had causes and beginnings; nor completed except by knowledge of its accidents and accompanying essentials.