Rarely promise, but, if lawful, constantly perform

Rarely promise, but, if lawful, constantly perform.

O! she's warm.If this be magic, let it be an artLawful as eating.

We must not promise what we ought not, lest we be called on to perform what we cannot

I grieve for life's bright promise, just shown and then withdrawn.

Most of this was true, ... But the most important thing was that Conboy wanted a promise that there would be no work stoppage.