Lying aggravates interactions

To everyone his own truth, his own beliefs and perceptions on this world, we are all different, we have to recognize it, accept it, and respect it, but if in an interaction with someone (and to a bigger extent with our surrounding) we consciously decide to conceal our truth, if we don't assume a thought or an emotion passing by us (and most often we are well aware when on a moment we are hiding something), then we are crudely lying to the other and so spoiling the connection that could be born of this interaction.