Akademik

Дуракам полработы не показывают
Incompetent people ought not to be shown an unfinished piece of work because they are unable to envision what it will be like when completed
Cf: Fools and bairns should not see half-done work (things half-done) (Br.). Never show a fool a half-done job (Am.)

Русско-английский словарь пословиц и поговорок. . 2013.