To believe with certainty we must begin with doubting.
Sentiment: NEGATIVE
It is easier to believe than to doubt.
Doubt grows with knowledge.
Doubt is not a pleasant condition, but certainty is absurd.
By doubting we are led to question, by questioning we arrive at the truth.
Doubt is an uneasy and dissatisfied state from which we struggle to free ourselves and pass into the state of belief; while the latter is a calm and satisfactory state which we do not wish to avoid, or to change to a belief in anything else.
Doubt your doubts before you doubt your beliefs.
That though we are certain of many things, yet that Certainty is no absolute Infallibility, there still remains the possibility of our being mistaken in all matters of humane Belief and Inquiry.
Wonder rather than doubt is the root of all knowledge.
Doubt begins only at the last frontiers of what is possible.
First we have to believe, and then we believe.