C. F. Keil and Franz Delitzsch on Proverbs 27:11

Pro 27:11

This proverb has, in common with the preceding tristich, the form of an address:

Become wise, my son, and make my heart rejoice,

That I may give an answer to my accusers.

Better than “be wise” (Luther), we translate “become wise” (lxx σοφὸς γίνου); for he who is addressed might indeed be wise, though not at present so, so that his father is made to listen to such deeply wounding words as these, “Cursed be he who begat, and who educated this man” (Malbim). The cohortative clause 11b (cf. Psa 119:42) has the force of a clause with a purpose (Gesen. §128:1): ut habeam quod iis qui me convicientur regerere possim; it does not occur anywhere in the Hezekiah collection except here.