It would be thought a hard Government that should tax its People one tenth Part of their Time, to be employed in its Service. Benjamin Franklin
The principle of asceticism never was, nor ever can be, consistently pursued by any living creature. Let but one tenth part of the inhabitants of the earth pursue it consistently, and in a day's time they will have turned it into a Hell. Jeremy Bentham
All lovers swear more performance than they are able, and yet reserve an ability that they never perform vowing more than the perfection of ten, and discharging less than the tenth part of one. William Shakespeare