Not knowing without knowing it is sick.
To be sick of sickness
is the only cure.
The wise aren't sick.
They're sick of sickness,
so they are well.
Lao Tzu. Tao te Ching.
Interpreted by Ursula K. Le Guin
What is "not knowing without knowing it?" Le Guin gives a short list of possibilities: "conviction, theory, dogmatic belief, opinion." I think this might be the meaning of the phrase: "If you meet the Buddha in the road, kill him." I should be so open minded, that even the truth which causes me to be open minded should be open to challenge.