Complex sentence: Although Kelsey's writing cites psychologists and motivational specialists, he disavows the modern self-help techniques that focus on positively and permanently altering personalities--instead aiming to simplify self-help into a series of progressive steps that take account of common insecurities.
Split into simpler sentences: Although Kelsey's writing cites psychologists and motivational specialists, he disavows the modern self-help techniques that focus on positively and permanently altering personality. Instead, he defines self-help as a series of progressive steps which must take account of common insecurities.