A baker presses dough \{to make bread\}.\par \{He puts the bread in the oven.\}\par The baker does not make the fire hotter\par while the bread is rising.\par \{But the people of Israel are not like that.\}\par The people of Israel are always making\par their fire hotter.\par
Then Jesus told the people another story: “The kingdom of heaven is like yeast that a woman mixes into a big bowl of flour to make bread. The yeast makes all the dough (bread) rise.”
Surely you know that when you give yourselves like slaves to obey someone, then you are really slaves of that person. The person you obey is your master. You can follow sin, or obey God. Sin brings spiritual death. But obeying God makes you right with him.