The kingdom of heaven is like ...
Jesus tells us that the kingdom of heaven is like someone who planted good seed, but found something else growing. He planted wheat, so he had good reason look for wheat and expect to find wheat. He found weeds among the wheat. Somebody else had planted that.
Jesus tells us that the kingdom of heaven is like someone who forgave another man a large debt. He showed mercy, so he had good reason to look for mercy and expect to find mercy in the other person. Instead he found pettiness and a hard-hearted, self-righteous self-interest. Somebody else had planted that. The other person hadn't recognized the mercy as redemption or as peace or as reconciliation. He hadn't recognized it as an act of compassion or love. Had he imagined that mercy was rightly due to him? To himself, and nobody else? Ingratitude is a close neighbor to arrogance.
So those two parables of the kingdom of heaven are parallel to each other in some basic ways.
Is every act of God a seed that he plants? It would explain why, if God is holy, his people are called to be holy, if he is merciful then his people are called to be merciful. It would explain how righteousness is rooted in the character of God. And how, because of God's love, the world can know Christ's disciples by their love.