by the sweat of one's brow

"But now it must be earned by the sweat of one's brow," Kirk said.

This means to work with determination and focus by the sweat of one's brow and not to be lazy and to waste one's life to time.

In most cases, income that is unearned is taxed at a much lower rate than income that is earned by the sweat of one's brow.

LEAD: Homesteading - acquiring ownership of government land by the sweat of one's brow - was a dream of millions of Americans 125 years ago.

The Bishop quoted Pope John Paul II in support of the right to work: 'The obligation to earn one's bread by the sweat of one's brow also presumes the right to do so.