The main thing is not to be afraid at all.
See: "The whole world is indeed a very narrow bridge, and the main thing is not to fear at all."
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Translation
Expression (Hebrew)
הָעִיקָּר לֹא לְפַחֵד כְּלָל
Definition (Hebrew)
רְאֵה: "כָּל הָעוֹלָם כֻּולּוֹ גֶּשֶׁר צַר מְאוֹד וְהָעִיקָּר לֹא לְפַחֵד כְּלָל".
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