“To believe is very dull. To doubt is intensely engrossing. To be on the alert is to live, to be lulled into security is to die.”

Come hither all ye believers and make me yawn.

The first 2 lines are far less accurate than accurate. The last 2 lines are more accurate than not. To believe in life and truth is extremely exhilarating and/or animating. To doubt is only an easy follow-up to knowing or believing something else. Doubt can engross the non-seeker of life, truth and he who is not alert.

To believe is very dull, lest you sharpen your wit !
To doubt is intensely engrossing, making dull the wit !
To be on the alert is to live, and guard your Liberty through belief.
To be lulled into security is to die, for the lack of an alert wit.