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Great men, Till they have gained their ends, are giants in Their promises, but, those obtained, weak pigmies In their performance. And it is a maxim Allowed among them, so they may deceive, They may swear anything; for the queen of love, As they hold constantly, does never punish, But smile, at lovers' perjuries.

Philip Massinger (1848). “The Dramatic Works of Massinger and Ford. With an introduction, by Hartley Coleridge”, p.175
Great men, Till they have gained their ends, are giants in Their promises, but, those obtained, weak pigmies In their performance. And it is a maxim Allowed among them, so they may deceive, They may swear anything; for