Changing gears

When mankind has been using gears, levers and pulleys, For thousands of years, To speed things up, Or slow things down, To make it possible to take heavier loads uphill, And to go faster on straight roads. Then came clocks to measure the passing of time. And with many machines geared to the speed needed, For their required tasks, One would think that humankind would lead less stressful lives, But no their brains remain unable to change down to a lower gear, Unless they take their brain out into the country for a year or two. Most however don't seem to have the heart for it, Are always looking to arrive at their destination Dead on Time, And one day they will, Sooner than they needed to.