Should a realized person preach others?

Is it wrong for a realized individual to propagate what he has experienced? Or should he keep away from the world without getting into the entanglement of Guru-disciple relations?

This was the question asked by Lohicca (DN 12: Lohicca Sutta) to Buddha. Lohicca felt that a realized person who has freed himself from all the worldly bondage should never get re-entrapped into the world by trying to gather disciples and preach them.

Buddha does not agree with Lohicca. He says that sharing what you have experienced is like sharing your extra wealth with the needy so that they too can enjoy it. You share not because you expect anything in return, but merely because you love everyone. Your communication should be such that the disciple can himself verify the merits of the teaching and willingly follow you.

Here, note that the Guru is not sharing it with some specific individuals, nor is he sharing for the sake of any benefit for himself (no fee involved ;-)). So, Buddha says that it is perfectly fine for a realized person to share his experience and knowledge. 

However, Buddha says that  it is wrong for a person if

1. He forcibly teaches things that he has never realized himself while his disciples also do whatever they like without heeding to him. Such forceful imposition of one’s views is wrong on the part of the Guru, since he himself has not realized what he teaches, and he has a desire to be accepted as a Guru.
2. He teaches things that he has never realized himself and his disciples willingly do exactly whatever he says. In that case, the Guru is misleading them.
3. He tries to teach things that he has realized, but his disciples don’t pay heed to him and do whatever they like. But the Guru goes on forcing them to follow whatever he says.  In this case, the Guru is unnecessarily getting into entanglement.

So the key is – share if you have actually realized, and to those who are willing to accept you; and most importantly don’t make it a business.