But ne’ertheless reflect, the little mouse, how sage a brute it is! Who never trusts its safety to one hole : for when it finds one entrance is block’d up, it has secure some other outlet.
Cogitato, mus pusillus quam sit sapiens bestia, aetatem qui uni cubili nunquam committit suam : quia si unum ostium obsideatur, aliud perfugium gerit.
Original text (Latin)
Notes from Wikiquote
Cf. Chaucer, The Wife of Bath's Prologue, l. 572
Variants
Consider the little mouse, how sagacious an animal it is which never entrusts its life to one hole only. (translator unknown)