Pay attention to what you hear and gain understanding. If you don’t listen you’ll lose what you think you’ve gained.
Read: Mark 4:24-25
24 Then he added, “Pay close attention to what you hear. The closer you listen, the more understanding you will be given—and you will receive even more. 25 To those who listen to my teaching, more understanding will be given. But for those who are not listening, even what little understanding they have will be taken away from them.”