My commentary in blue.

4. Catching the bull

I seize him with a terrific struggle.
His great will and power are inexhaustible.
He charges to the high plateau far above the cloud-mists,
Or in an impenetrable ravine he stands.

I saw him and captured him.  He is separate from me, but we are the same.  I have to remember that he is not my identity.  Please let me remember.

Don’t fight any feelings that you may be having.  You are observing the moment and you may be making a judgement on it.  Understand that feeling and do not try to turn it off.  Try to trace the cause of the feeling back to the source.  Understand why it is making you feel that way.  Realize that it is making you judge.  And then step back from it.  There he is.  There is the ego.  You got him.
Original Comment:

He dwelt in the forest a long time, but I caught him today! Infatuation for scenery interferes  with his direction.  Longing for sweeter grass, he wanders away.  His mind still is stubborn and unbridled. If I wish him to submit, I must raise my whip.