That happens while you are talking with people - you go on and on in subtle ways, trying to prove that you are right. And the other goes on trying to prove that he is right. Then dialogue is not possible.
Dialogue means trying to understand the other with an open mind. Dialogue is a rare phenomenon and it is beautiful, because both are enriched through a dialogue. In fact, while you talk, either it can be a discussion -- both opposite to each other, a verbal fight, trying to prove that I am right and you are wrong -- or a dialogue, which is different.
Dialogue is not posing against each other, but taking each other's hand, moving together towards the truth, helping each other to find the way. It is togetherness, it is a cooperation, it is a harmonious effort to find the truth. It is not in any way a fight, not at all. It is a friendship, moving together to find the truth, helping each other to find the truth.
Nobody has the truth already, but when two persons start finding out, enquiring about the truth together, that is dialogue -- and both are enriched. And when truth is found, it is neither of me, nor of you. When truth is found, it is greater than both who participated in the enquiry, it is higher than both, it surrounds both -- and both are enriched.
Dialogue is the beginning between a master and a disciple; and it must happen at the entrance, otherwise going into the temple is not possible. Hence the words "at the entrance" -- it must happen at the gate. The first thing is the dialogue: if it doesn't happen, then there is no possibility of any disciplehood. Then Ikkyu would have said good-bye, at the very entrance, because there would be no need to invite the person into the temple, there would be no meaning in it. So sitting at the entrance, just sitting on the steps, this dialogue happened.
-Osho, "The Grass Grows By Itself, #8"