The last line is manifestly an alteration of the words of Parmeno in The Eunuch of Terence:—
Quid agas, nisi ut te redimas captum quam queas minimo?—Act I. Sc. 1.
In another play Terence says,—
Facile omnes, cum valemus, recta consilia, ægrotis damus;
Tu si hic sis, aliter censeas.—Andrian XI. 1.
Shakspeare has it,—
Men
Can counsel and give comfort to that grief
Which they themselves not feel; but, tasting it,
Their counsel turns to passion.