The leaven we didn't see coming

Put a spoon of yeast into a lump of dough, walk away, and come back in an hour. What was flat and dense has doubled in size. Try to find where the yeast ends and the dough begins. You can't. Cut the loaf open anywhere you like: the yeast isn't just sitting inside the bread, it is the bread now.

In Mark 8:15, on a boat, with His disciples fretting over forgotten bread, Jesus gave them a warning that had nothing to do with lunch: "Take heed, beware of the leaven of the Pharisees, and of the leaven of Herod." Jesus called out two specific doctrines, two ideologies that behave exactly like the yeast in the bowl. They don't announce themselves or ask for permission. But they enter small, and left alone long enough, move from being an idea to becoming an identity.

So what's the leaven of the Pharisees and the leaven of Herod?

The leaven of the Pharisees is hypocrisy - Jesus says so plainly in Luke 12:1. It's religion as performance: tithing mint and cumin down to the leaf while neglecting justice, mercy, and faith (Matthew 23:23), scrubbing the outside of the cup while the inside stays filthy (Luke 11:39). It's showing up devout, sounding devout, being praised as devout, while the actual posture of the heart toward God is something else entirely. And why its described as leaven and not just a bad habit is this: performative religion doesn't stay confined to a Sunday morning. Give it enough time and it reshapes how you see everything - your prayer life, your giving, your marriage, your business, your timeline. You start measuring holiness by what's visible instead of what is real and within. You become blind to the fact that God sees the deepest parts of the heart and nothing is secret with Him. You get convinced by your own theatrics and assume yourself to be what you aren't.

The leaven of Herod works differently, but is equally dangerous. The Herodians were a political faction - Jews who staked their security on staying close to Herod's throne and to Roman power, who read the moment and decided survival meant alignment. Herod himself, a few chapters earlier in Mark's own account, was a man who found Jesus fascinating and even listened to Him gladly, yet would not repent (Mark 6:20). Curiosity without surrender. Proximity to truth without submission to it. The leaven of Herod is what happens when worldly power, position, or national belonging becomes your real god, while "Jesus" is simply a label you stick on.

Set them side by side and you'll notice something. Both are about mixing: devotion mixed with performance, faith mixed with power. 

Where the leaven is rising right now

We are watching this exact leaven work in real time, and most of us are standing too close to the bowl to see it clearly.

In many corners of the church today, nationalistic fervor has learned to dress itself up as "Christian thinking." Political allegiance gets preached with the fire that used to be reserved for the gospel. Outrage over a policy, an election, a cultural flashpoint gets framed as righteous indignation – as though the Kingdom of Heaven rises or falls with a single vote or a single flag. We are allowing the Herodians of our time - political voices and political interests who have conveniently stuck on the "Christian" label to appeal to their target audience - shape what is right, what is true for us instead of what we have learned of Christ to be right and true. This is the leaven of Herod, power and national belonging elevated to the place only God should occupy.

The tragedy is that this leaven doesn't look like compromise at the onset. It looks like patriotism, or "concern for the Christian brethren around the world". It shows up as godly fervor. As "standing for truth." As moral outrage over a genuine issue (because leaven will find a legitimate grievance to hide inside). So this is an appeal - to everyone that recognized themselves. If you read the above paragraph and felt even the slightest sting, I'm appealing to you earnestly. PLEASE PAUSE. Take a step back. Sit with what could possibly be happening, with the fact that leaven could be slowly but sneakily working its way through your heart right now.

Pausing is critical, because this is leaven we are talking about. It's not fat you could skim off, shake yourself out and walk away from. It's end goal is not to become your ideology but your identity. Pausing gets harder the longer you put it off, because the longer an ideology sits in your heart, the harder it becomes to examine it. You start to see yourself so intricately connected to it that letting go of it seems like attempting to rename yourself. Paul's instruction to the Corinthian church still stands: "Examine yourselves, whether ye be in the faith; prove your own selves" (2 Corinthians 13:5). Ask yourself: right now, is my worldview still aligned (or still on the journey of alignment) to the Christlike position, the perfect balance of love and truth, mercy and judgement? Is my outlook becoming more conformed to the world or more transformed by the renewing of my mind?

The way forward isn't cynicism but godly and prayerful caution toward every ideology that arrives wearing the costume of moral shock or outrage (because that is exactly how leaven gets past the door). "He that answereth a matter before he heareth it, it is folly and shame unto him" (Proverbs 18:13). Slow down before you adopt the position. Slow down further before you let the position start reshaping how you see the people who agree with you and the people who don't. James said it plainly too: be "swift to hear, slow to speak, slow to wrath" (James 1:19). Whenever you catch indignation rising in you in response to reported moral failure from the other camp that is threatening to "taint the world", rein it in and redirect it, because "the wrath of man does not work out the righteousness of God" (James 1:20). Recognize such moments as an opportunity for God's intervention: call on Him and let Him lead you to your next course of action if any; ask Him to protect your heart.

"He that is first in his own cause seemeth just; but his neighbour cometh and searcheth him" (Proverbs 18:17). Every ideology sounds airtight from the inside. Ask the position direct questions before it asks you for your allegiance: does this soften me toward the people it tells me to oppose, the way Christ softened toward His enemies? Or does it teach me to sort people into camps He never sorted them into? Does it grow my mercy, or just heighten my suspicion?

"Let not mercy and truth forsake thee: bind them about thy neck, write them upon the table of thine heart" (Proverbs 3:3). Whatever position you hold, hold it next to both. Truth without mercy curdles into condemnation with no love left in it. Mercy without truth softens into a mush that calls evil misunderstood. Christ walked the perfect balance, full of grace and truth (John 1:14), and any doctrine, movement, or party that asks you to drop one to keep the other isn't asking you to follow Him but something else.

"Keep thy heart with all diligence; for out of it are the issues of life" (Proverbs 4:23). Has leaven found its way in?