<p>11:9 <i>But a voice answered the second time out of heaven</i>- Perhaps it came twice because Peter twice stated his objection to obedience- see earlier on this verse.</p><p><em>What God has cleansed, do not make common</em>- The idea seems to be that God had potentially cleansed Gentile individuals, making the cleansing sacrifice of His Son relevant to them; but by not preaching to them or accepting them, they would be made unclean by the sin of omission of the members of the Lord's body who refused to accept them. We see here how much has been delegated to us; and the deep significance of sins of omission in the lives of others. It's simply not the case that if we do not accept or preach to someone, then God somehow will find another way. Rather has their salvation been placed in our hands, and if we mess up, then it won't happen.</p>