You do not examine legislation in the light of the benefits it will convey if properly administered, but in the light of the wrongs it would do and the harms it would cause if improperly administered.

Lyndon B. Johnson (1908-1973) American politician, educator, US President (1963-69)

(Attributed)

Widely attributed to Johnson, and in keeping with his reputation as a wily legislator, but no actual source found.