It is easy to bowl down hill.

A ball needs little help to travel downhill. Likewise, a task can seem easy when circumstances already favor its progress.

The saying distinguishes ease from skill or effort: an outcome may owe as much to a helpful course as to the person who set it in motion.

Use this proverb when someone has an advantage or when events are already moving in the desired direction. It can temper praise for an easy success by drawing attention to the favorable conditions behind it.