{For} (gar). Correct text, not de. Paul appeals to the
experience of the Israelites in the wilderness in confirmation of
his statement concerning himself in  9:26f.  and as a powerful
warning to the Corinthians who may be tempted to flirt with the
idolatrous practices of their neighbours. It is a real, not an
imaginary peril. {All under the cloud} (pantes hupo t(886e)
nephel(886e)). They all marched under the pillar of cloud by day
( Ex 13:21  14:19 ) which covered the host ( Nu 14:14  Ps
95:39 ). This mystic cloud was the symbol of the presence of the
Lord with the people.