Possible Clues:

• Looking for faults, like reviewer?
• Vital to be discriminating
• One in an armchair perhaps, half-hearted, not approving
• Decisive - fault-finding
• Not in agreement with a state that's so dangerous
• Censorious - to a dangerous degree
• It's vital to be censorious
• How decisive a reviewer should be
• Finding fault - at a dangerous stage
• Disparaging grave