We also are compassed (καὶ ἡμεῖς). According to this the sense would be, those described in ch. 11 were compassed with a cloud of witnesses, and we also are so compassed. Wrong. The we also should be construed with let us run. “Therefore let us also (as they did) run our appointed race with patience.” Seeing we are compassed about with so great a cloud of witnesses (τοσοῦτον ἔχοντες περικείμενον ἡμῖν νέφος μαρτύρων). Lit. having so great a cloud of witnesses lying around us. Νέφος cloud,
Volume 4, Page 536