The wise man does nothing but what can be done openly and without falseness, nor does he do anything whereby he may involve himself in any wrong-doing, even where he may escape notice. For he is guilty in his own eyes before being so in the eyes of others; and the publicity of his crime does not bring him more shame than his own consciousness of it.
Ambrose... the Apostle Peter declared that the Church was built by the Holy Spirit. For you read that he said: 'God, Who knows the hearts of men, bore witness, giving them the Holy Spirit, even as was given to us; and He made no distinction between us and them, purifying their hearts by faith' (Acts 15:8-9). In which is to be considered, that as Christ is the Cornerstone, Who joined together both peoples into one, so, too, the Holy Spirit made no distinction between the hearts of each people, but united them.
Ambrose