Mark 4:24,25

And he said to them, “Pay attention to what you hear: with the measure you use, it will be measured to you, and still more will be added to you. For to the one who has, more will be given, and from the one who has not, even what he has will be taken away.”

To hear wholeheartedly, and share generously, is like financial investment.  The more money that is invested the more interest it brings back; indeed it is like compound interest. But he who is unwilling to hear is like the man who hides his money under the floor. He gains no interest at all; and it will be worse still when he is finally robbed of all.