Jesus’ exhortation is for us to pay attention to what we hear and learn.
I think his exhortation is faithfulness to what we hear. And we show ourselves to be faithful listeners by doing appropriately and responsively.
This passage is challenging because I find that I suffer from the syndrome of knowing too much by obeying too little.
I cannot live under the illusion that to know something is to be found faithful with that knowledge. But rather, I desire to to pull myself to the simple reading of scripture and to obey what I see and hear.
Jesus wants radical followers not lazy scholars of his word.