These lines come from the proem to Book V, and should be understand in that context. The proems of each book show Lucretius at his most poetical, and here in the fifth book he is draping Epicurus with plaudits - the labors of Epicurus in philosophy should be compared with labors of Hercules, and Epicurus himself should be regarded with the reverence due to a god.
Indeed, the labors of Hercules were as nothing compared with the things that Epicurus has saved us from. The Lernaen Hydra, Nemeaean Lion, and Calydonian Boar could have been easily avoided. Just don't go near those wild places and you'll be safe. But who will save us from the dangers that are so near us that we cannot flee them?
Epicurus. His philosophy was a gift far greater than any given in the old stories, because he gave us the clarity and strength of mind to confront these dangers ourselves - there is no longer any need to cower behind the club of Hercules, or the shields of Ajax, Achilles, or the Aegis of Athena.
The vera ratio or 'true philosophy' does all this and more. And so we honor him above all the rest.