We cling to falsehood because we feel that our honor and sense of self-worth is tied up with the act that we committed, with the words that we spoke, with beliefs that we maintained or with ideals that we were committed to. When we abandon a falsehood and we acknowledge the truth we are essentially saying: “I am not what I did, I am not what I believed and I am not what I thought. I am a lover of truth. I am a servant of the God of truth and I am one who strives to align my life with His truth. That is me and this is my essence.”
When we acknowledge the truth not only do we enrich our own lives but we enrich the lives of those around us.
…When a child observes an adult acknowledging the truth the child learns that the adult does not measure herself by her actions but rather the child senses that the adult has a stronger sense of self-worth that is not measured by the transitory. The child will learn that their own self-worth is something intrinsic to their souls and can never be taken from them. They will come to recognize that our yearning for truth is the breath of God in our nostrils and that this desire is the reality of our being.
(Rabbi Yisroel Blumenthal – http://yourphariseefriend.wordpress.com/2013/01/28/truth-and-repentance-psalm-517/)