Since knowledge is but sorrow's spy, It is not safe to know. — William Davenant

Sorrow is knowledge, those that know the most must mourn the deepest, the tree of knowledge is not the tree of life. — Lord Byron
In friendship as well as love, ignorance very often contributes more to our happiness than knowledge. — Francois de La Rochefoucauld
Only on paper has humanity yet achieved glory, beauty, truth, knowledge, virtue, and abiding love. — George Bernard Shaw
Fame, like the river, is narrowest where it is bred, and broadest afar off. — William Davenant
Calamity is the perfect glass wherein we truly see and know ourselves. — William Davenant