What is the author's tone in Under My Skin by Doris Lessing?

The tone of Doris Lessing is one of someone who would like to tell the entire story of her life to her readers, but realizes somewhere in the writing of it that the truth would hurt too many people. The writer realizes when reflecting on her actions and her attitudes of this time period, 1919 to 1949, that instead of making herself look better, the truth would more likely present her in a bad light.