Matthew 13:33 He (Jesus) put forth another parable for them, “The kingdom of heaven is like yeast that a woman took and placed into a large amount of flour until it had leavened the whole dough.”
Jesus is instructing us with this statement. The kingdom of heaven is like making bread. We are to place something small, but transforming into ourselves, then we are to start working it until it has moved throughout our being – and then we ready for the heavenly fire. …that power of God which transforms us from earthly elements to essential bread.
This is how we grow spiritually by the sacred word of God, contemplation and deep meditation. Here Jesus describes the kingdom of heaven as a journey — or someting to grow into.