Read Matthew 13:31-33, 44-52
13:31 He put before them another parable: "The kingdom of heaven is like a mustard seed that someone took and sowed in his field;
13:32 it is the smallest of all the seeds, but when it has grown it is the greatest of shrubs and becomes a tree, so that the birds of the air come and make nests in its branches."
13:33 He told them another parable: "The kingdom of heaven is like yeast that a woman took and mixed in with three measures of flour until all of it was leavened."
13:44 "The kingdom of heaven is like treasure hidden in a field, which someone found and hid; then in his joy he goes and sells all that he has and buys that field.
13:45 "Again, the kingdom of heaven is like a merchant in search of fine pearls;
13:46 on finding one pearl of great value, he went and sold all that he had and bought it.
13:47 "Again, the kingdom of heaven is like a net that was thrown into the sea and caught fish of every kind;
13:48 when it was full, they drew it ashore, sat down, and put the good into baskets but threw out the bad.
13:49 So it will be at the end of the age. The angels will come out and separate the evil from the righteous
13:50 and throw them into the furnace of fire, where there will be weeping and gnashing of teeth.
13:51 "Have you understood all this?" They answered, "Yes."
13:52 And he said to them, "Therefore every scribe who has been trained for the kingdom of heaven is like the master of a household who brings out of his treasure what is new and what is old."