Deviate an inch, lose a thousand miles

Begin with an error of an inch and end by being a thousand miles off the mark

Pick up a sesame seed but lose sight of a watermelon.

The other key is that we don't deviate more than five miles from where the vehicle is actually going, so if you're going down 301 and live within five miles off of 301, then you're probably able to catch a ride.

The journey of a thousand miles begins with one step.

I'd rather have an inch of a dog than miles of pedigree