These verses are about the faithfulness of God.

The word seek indicates a pursuit of God’s will. It’s a continual seeking.
The word knock indicates persistence of the one asking. You get the image of someone standing at the door and just knocking for awhile. Almost in an annoying way haha.

When it says you who are evil, Jesus means that we are all cursed by the fall. He is saying, even parents under the curse of sin know how to treat their kids well. So if you guys can do it, God will definately do it.

We trust in the goodness and faithfulness of God to supply for us whatever we need most. He is God, and He knows best.