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The road to perseverance lies by doubt.
The road to perseverance lies by doubt.
 Uncertain ways unsafest are,
 And doubt a greater mischief than despair.  
 Uncertain ways unsafest are,
 And doubt a greater mischief than despair. 
Fanaticism is . . . overcompensation for doubt.
Fanaticism is . . . overcompensation for doubt.
In all affairs it's a healthy thing now and then to hang a question mark on the things you have read more
In all affairs it's a healthy thing now and then to hang a question mark on the things you have long taken for granted.
Our doubts are traitors and make us lose the good we oft might win, by fearing to attempt
Our doubts are traitors and make us lose the good we oft might win, by fearing to attempt
Doubt is the father of invention.
Doubt is the father of invention.
 But the gods are dead--
 Ay, Zeus is dead, and all the gods but Doubt,
  And doubt read more 
 But the gods are dead--
 Ay, Zeus is dead, and all the gods but Doubt,
  And doubt is brother devil to Despair! 
Doubt is the beginning not the end of wisdom
Doubt is the beginning not the end of wisdom