/lit/ - Literature

Could someone construe this sentence for me?

"Is enim fueram qui, cum mihi liceret aut maiores ex otio fructus capere quam ceteris, propter variam suavitatem studiorum in quibus a pueritia vixeram, aut si quid accideret acerbius universis, non praecipuam sed parem cum ceteris fortunae condicionem subire, non dubitaverim me gravissimis tempestatibus ac paene fulminibus ipsis obvium ferre, conservandorum civium gratia, meisque propriis periculis parere commune reliquis otium."

I can't figure out why subire is in the infinitive. I basiclaly know what Cicero is talking about, but I'd love it if someone could figure this sentence out for me.

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