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."
The "Old Treasure" was the wisdom of the Torah. The "New Treasure" Jesus teaching about the Kingdom. It is interesting that you can take "Old Treasure" melt it down, re - 'set' it and create something of greater beauty. The substance remains the same - but the form changes.
Lord help me to find the your new treasure in my old and rusty life.