It will not be an easy promise to keep.

It was an easy promise for Simon to make.

"Over the course of your life, you may find, daughter, that yours is not such an easy promise to keep."

Being available midday on a Monday is not an easy promise to keep for a single father of three with a full-time job.

In the end, it was an easy promise to make.

"An easy promise to make, sweet lady, until another man claims you."

But that was an easy promise for them to make, since they basically favor the package.

Ehrenberg later admitted this was an easy promise to make, as no one expected the same government to be in power the following year.

"Yes," Reacher said, because it was an easy promise to make.

It is an easy promise to make, for no one will be alive to call them to account when they fail.