Dialogue cannot exist without humility.

Some relevant bits from Paulo Freire:

No one is born fully-formed: it is through self-experience in the world that we become what we are.

No one can be authentically human while he prevents others from being so. 

Within the word we find two dimensions-reflection and action. If one is sacrificed even in part, the other immediately suffers. To speak a true word is to transform the world.