Read: Mark 8:11-21 NLT – Pharisees Demand a Miraculous Sign – Bible Gateway
“As they were crossing the lake, Jesus warned them, ‘Watch out! Beware of the yeast of the Pharisees and of Herod.’” Mark 8:15 NLT

Continuing with our series in the book of Mark on Sunday’s Biblical Insights this week we see Jesus on the move again. After miraculously feeding another large crowd of almost 16,000 with seven loaves of bread and a few fish, Jesus leaves the Decapolis region and heading back across the sea to the region of Dalmanutha.
Once again people are waiting for His arrival. This time it is the Pharisees who have not given up questioning Jesus but continue to harass Him demanding proof of His deity. They were demanding Jesus show them a sign to prove the divine authority He is claiming. The Pharisees have seen His previous miracles but wanted more. They were looking for a convincing celestial event to prove His power over the heavens and the earth. When Jesus heard this, he sighed deeply. Last week we noted Jesus’ compassion by sighing at the healing of the deaf and mute man, this week He sighs in grief for their refusal to believe. Jesus refused to give in to their demand knowing that the Pharisees really didn’t believe He could perform such a miracle. Their intent was to keep on trying to discredit Jesus and deflate His popularity.

Jesus left Dalmanutha after this confrontation with the Pharisees. “So he got back into the boat and left them, and he crossed to the other side of the lake” (Mk,8:13 nlt) Jesus went back to the eastern side of the Sea of Galilee arriving at the fishing town of Bethsaida on the northern shore, the home to Peter, Philip, and Andrew. During the trip Jesus’ disciples were taught an important truth, although they were unaware of it at the time. ‘Beware of Persuasive Influences of Sin.’ “As they were crossing the lake, Jesus warned them, ‘Watch out! Beware of the yeast of the Pharisees and of Herod.’” (Mk.8:15 nlt) The disciples’ minds instantly went to the fact they forgot to take food along for the trip. Whether they thought Jesus was referring to this or something else is not clear, but “At this they began to argue with each other because they hadn’t brought any bread.” (Mk.8:16 nlt) How often we’re quick to jump to conclusions thinking we know why something is occurring. It’s usually not the case, just our minds feeding our self-serving attitude. These were the disciples on the boat that day.
What Jesus told His disciples went right over their heads. Jesus was referring to the yeast as a symbol of evil or corruption. A tiny amount of yeast can ferment a large amount of dough. A little yeast of sin in our lives will ferment into a large lump of uncontrollable sin leading to disaster. The Pharisees had the yeast of hypocrisy. This was seen by their earlier demand for Jesus to perform a sign when they didn’t believe He could perform one. Herod’s yeast was secularism and worldliness. A little influence in these areas is all that is needed to quickly rise the temptation of sin. This is what Jesus was telling His disciples back then and to us in our day. Beware of persuasive influences of sin.
Jesus knew the disciples didn’t get it and knew what they were arguing about. They were missing a vital spiritual point because they were focusing on their material needs, namely food. “Why are you arguing about having no bread? Don’t you know or understand even yet? Are your hearts too hard to take it in?……Don’t you remember anything at all?” (Mk.17-18 nlt) The disciples witnessed Jesus feeding 4,000 men plus women and children just days before and saw Him feed 5,000 men plus women and children before that, and yet they’re worried about what they will eat when the miracle worker is right in front of them. So concerned they were that they missed His important teaching about the influences of sin.

Christians today have the same problem of deciphering what to beware of in all the influences in our lives. Herod’s yeast of secularism is likely the most influential to beware of. Living in the world and not being part of the world is a daily struggle. It’s easy to succumb, that is why Jesus gave us the warning, beware. The Pharisees yeast of hypocrisy should not be dismissed as if it can’t be applied to us. It can. It’s too easy to say one thing and do another. We live in a world where it is very easy to be persuaded by all that is around us. We should not be naive in thinking we can always discern if the persuasive influences in our lives are of a sin nature or not without the help of the Holy Spirit. Jesus tells to beware, and He has sent His Holy Spirit to help us beware and live a life free from giving in to the persuasive influences of sin.