The Present State of the Kingdom of God

Mixed - you cannot tell the difference between true and false believers easily.
He put another parable before them, saying, "The kingdom of heaven may be compared to a man who sowed good seed in his field, but while his men were sleeping, his enemy came and sowed weeds among the wheat and went away. So when the plants came up and bore grain, then the weeds appeared also. And the servants of the master of the house came and said to him, 'Master, did you not sow good seed in your field? How then does it have weeds?' He said to them, 'An enemy has done this.' So the servants said to him, 'Then do you want us to go and gather them?' But he said, 'No, lest in gathering the weeds you root up the wheat along with them. Let both grow together until the harvest, and at harvest time I will tell the reapers, "Gather the weeds first and bind them in bundles to be burned, but gather the wheat into my barn."'" (Matthew 13:24-30 ESV)

Growth - the kingdom started small by ordinary people and grew big and influential.
He put another parable before them, saying, "The kingdom of heaven is like a grain of mustard seed that a man took and sowed in his field. It is the smallest of all seeds, but when it has grown it is larger than all the garden plants and becomes a tree, so that the birds of the air come and make nests in its branches." (Matthew 13:31-32 ESV)

Potent - a small group of believers can bring great changes to the society they are in.
He told them another parable. "The kingdom of heaven is like leaven that a woman took and hid in three measures of flour, till it was all leavened." (Matthew 13:33 ESV)