Grocott & Ward, comps. Grocott’s Familiar Quotations, 6th ed. 189-?.
Infirm
Infirm of purpose.
Shakespeare.—Macbeth, Act II. Scene 2. (Lady Macbeth.)
That last infirmity of noble minds.
Milton.—Lycidas, Line 71.
Though the desire of fame be the last weakness
Wise men put off.
Massinger.—A Very Woman, Act V. Scene 4, and Gifford’s note on this passage.