If you effect your neighbor your meditation effects your neighbor.
Here is the whole koan about the Zen master who called out to himself and made a slave-master relationship in his head, i think I've posted it before.
"CASE 12. ZUIGAN CALLS HIMSELF "MASTER"
Every day Zuigan used to call out to himself, "Master!" and then he answered himself, "Yes, Sir!" And he added, "Awake, Awake!" and then answered, "Yes, Sir! Yes, Sir!" "From now onwards, do not be deceived by others!" "No, Sir! I will not, Sir!"
Mumon's Comment:
The master, Zuigan, sells out and buys himself. He has a lot of puppets of gods and devils that he plays with. Why is this so? With one mask he asked, and with another he answered. With another mask he said, "Awake!" and another, "Don't be cheated by others!"
If you adhere to any one of these, you are totally mistaken. If, however, you imitate Zuigan, then all these are no other than the fox's disguises.
Some who search the Way of Zen do not realize true self,
For they recognize only the ego-soul.
This ego-soul is the seed of birth and death,
Foolish people take it for the true original self. "
It doesn't seem to me you understood his point, maybe if you hadn't replied so fast.
Zazen is simply sitting down and trying to stay wide awake.
Much Metta,
-bodhisattva