Ne Mihi Suffenus essem - Not to be my own Suffenus
Not to flatter myself, and make a fool of myself by my conceit. Suffenus was an exceedingly incompetent poet, eloquent on the subject of other men’s faults and blind to his own. Hence arose the current proverb, and those who were foolishly pleased with themselves were called ‘Suffenuses’. Catullus in one of his epigrams:
“Duller is he than country dullness’ self,
Once he takes pen in hand, yet ne’er so happy
As when he scribbles verse; then is he all
Self-admiration and self-centered bliss.”
And again: “There’s Suffenus touch about us all.” Horace makes his Maevius very like Suffenus, blind to his own faults and bitterly attacking those of others: “I have excuses for myself, says Maevius.” - from Erasmus
John Owen uses the term “Suffenuses” to describe young theologians who think they know it all (a besetting sin of mine - and for no good reason - unfortunately).
He writes:
It has been the presumption of some, and especially of youths who profess to have dedicated themselves to this study but who have hardly gone further in evangelical studies than the reading of three or four volumes, to behave as if they alone were experts, and to consider that they are deserving of a glorious reputation among the great scholars. Such arrogance! Better it would be if such Suffenuses did not also go on to despise those who are truly endowed with the wisdom that they so foolishly boast of having attained to (emphasis mine). Theologoumena, Book VI, Ch. 1, p. 1. / Biblical Theology, 591.
Owen spends a good deal of his time in his excellent work, Theologoumena, warning students of theology of the many dangers that arise from the attainment of knowledge. He also has many good things to say about the whole task and purpose of theology.