Sin is enticing because it offers a quick route to prosperity or pleasure and makes us feel like one of the crowd. But when we go along with others and refuse to listen to the truth, our own appetites become our masters, and we'll do anything to satisfy them. Sin, even when attractive, is deadly. We must learn to make choices, not on the basis of flashy appeal or short-range pleasure, but in view of the long-range effects. Sometimes this means steering clear of people who want to entice us into activities that we know are wrong. We can't be friendly with sin and expect our lives to remain unaffected.
The Lord had promised to be with His people (Isa_8:10), but many in both Israel and Judah refused to believe He would keep His promise. The Lord warned Isaiah not to be like many of those people (Isa_8:11). Again Isaiah emphasized that the people of Judah should not be afraid of the Aram-Israel alliance or of the Assyrian threat looming on the horizon (Isa_8:12). Rather they were to be afraid of the Lord Almighty. He is the One they should fear and dread (Isa_8:13; cf. fear and dread in Isa_8:12 and see the comments on “fear” in Deu_4:10). The Lord will be a sanctuary, a place of safety, for those who believe in Him, but for those who do not believe Him, He will be the means of destruction (a stone… a rock.… a trap, and a snare). Peter quoted part of Isa_8:14 (1Pe_2:8), referring to those who reject Jesus Christ. Isaiah’s message follows an emphasis in the Old Testament. God promised that those who believe in and obey the Lord will be blessed but those who refuse to believe in and obey Him will be disciplined.
Quoting Psa_118:22, Jesus showed the unbelieving leaders that even their rejection of the Messiah had been prophesied in Scripture. Ignoring the cornerstone was dangerous. A person could be tripped or crushed (judged and punished). Jesus' comments were veiled, but the religious leaders had no trouble interpreting them. They immediately wanted to arrest him. The Life Application Study Bible