On the sabbath day, the Lord Jesus stood to read the scriptures. This was a common practice in New Testament times as the Jews would read the scriptures every sabbath day (Acts 13:27; Acts 15:21). Publick scripture reading was not uncommon and appears to have also been a practice of the Israelites in the Old Testament (Exodus 24:7; Deuteronomy 31:11; 2 Kings 23:2; Nehemiah 8:3). The Bible also records that publick reading was common in the early church. Unlike today, believers did not own personal copies of the scriptures. Believers learned the scripture from publick reading (1 Thessalonians 5:27; 1 Timothy 4:13). Even now, believers should make an effort to publickly read the scriptures.
Reading commentaries offers varying opinions concerning the definition of purity. However, the Bible offers some exacting details which give the right definition. Today's passage speaks of the “pure blood of the grape.” In other words, nothing was added to the juice—it was pure. There are several other substances in scripture identified as pure: gold (Exodus 25:39), olive oil (Exodus 27:20), myrrh (Exodus 30:23), incense (Exodus 37:29), and language (Zephaniah 3:9). Each instance emphasizes that nothing exists to corrupt the nature of the original. These substances are not combined with other materials to dilute or defile them. In essence, purity demands the absence of any substance that corrupts, defiles, or taints in any way.
