He has just finished talking about people who don’t respond and people who do, and why people walk away from the best thing there could ever be.
“No one lights a lamp and hides it in a clay jar or puts it under a bed. Instead, they put it on a stand, so that those who come in can see the light.” That’s true, and unarguable. No one does this. We light a lamp so we can see.
“For there is nothing hidden that will not be disclosed, and nothing concealed that will not be known or brought out into the open.” Jesus is not talking about the secrets of your life, but the mysteries of the universe, and particularly the truth about salvation and eternity and God. The point is not that someday everyone will know your secrets, but that some day you will finally understand. No matter what “soil” you were, the truth will come out eventually, and all the curtains will be removed and the windows thrown open.
“Therefore consider carefully how you listen. Whoever has will be given more; whoever does not have, even what they think they have will be taken from them.” A certain amount of the secrets of life and the mysteries of the universe can be known now. Those who seek will find. Those who understand will learn more. Those who don’t will sink deeper in their misdirection.