'Heed' in the Bible

The doorkeeper opens [the gate] for this man, and the sheep hear his voice and pay attention to it. And [knowing that they listen] he calls his own sheep by name and leads them out [to pasture].

I have other sheep [beside these] that are not of this fold. I must bring those also, and they will listen to My voice and pay attention to My call, and they will become one flock with one Shepherd.

One who does not [really] love Me does not keep My words. And the word (teaching) which you hear is not Mine, but is the Father’s who sent Me.