Passing over the military skill of Diocletian, we can scarcely refuse to acknowledge that the man who formed the scheme of reconstructing a great empire, and executed his plan within so brief a space of time, must have combined a bold and capacious intellect with singular prudence and practical dexterity.
Passing over the military skill of Diocletian — Ako zanemarimo/previdimo Dioklecijanove vojne veštine, Ako ostavimo po strani Dioklecijanove vojne veštine, Ako zaboravimo činjenicu da je Dioklecijan bio vešt vojskovođa, …
we can scarcely refuse to acknowledge — ne možemo zanemariti činjenicu, ne možemo a da ne odamo priznanje, ne možemo da ne priznamo…
that the man who formed the scheme of reconstructing a great empire, and executed his plan within so brief a space of time, — da je čovek koji je bio tvorac šeme/plana za rekonstrukciju velikog carstva/kojije osmislio rekonstrukciju velikog carstva, i koji je izvršio u tako kratkom vremenskom roku…
must have combined a bold and capacious intellect with singular prudence and practical dexterity. — morao kombinovati (sigurno kombinovao) smeli i sposoban intelekt sa jedinstvenomo razboritošću i prektičnim umećem.
pass over - zanemariti, prevideti… NE razmatrati
must have + past participle — - mora da, sigurno je da (izražava gotovo sigurnu pretpostavku za prošlost)