After Rumi (on the certainty of fire)

If your knowledge of fire derives from words   you should seek to be cooked by fire!
There's no certainty until you feel the flame   come and sit in the nook of fire!

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[The above comprises my recasting (into couplet form) of the thought found in this literal translation from the Farsi of Jelaluddin Rumi]:

"If your knowledge of fire has been turned to certainty by words (alone), seek to be cooked (by the fire itself)
and do not abide in the certainty (of knowledge derived from others).
There is no intuitive (actual) certainty until you burn;
if you desire this certainty, sit down in the fire."

— Jalal-ud-Din Rumi; translated by Afzal Iqbal