નડતરને નહાનું જાણવું નહીં.

naḍataranē nahānuṁ jāṇavuṁ nahīṁ.

Literally: Do not consider an obstacle to be small.
What it means: Never underestimate any hurdle or enemy, no matter how insignificant they seem.

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1923) · read from the scan by machine — the Gujarati itself is unchecked · English is machine-made and nobody has checked it yet

Heard it differently, or know we've got the sense wrong? Tell us — that is exactly the kind of correction this needs.