We must possess foresight that stays one step ahead of the times.
Literal
We [topic-は] era [to-に] one-step preceded insight [object-を] hold-[must-ねばならない].
先んじる ('to be ahead of, to precede') is a literary verb from 先 'ahead.' 見識 ('insight, discernment') implies deep, cultivated understanding — more elevated than 考え or 意見. ~ねばならない is the formal obligation form, equivalent to ~なければならない but crisper and more literary. The register is oratorical — something a leader might say in a speech.