1) The document discusses how attitude is a major factor in one's life and success, with only 10% of an iceberg visible above water while 90% is below the surface, similar to how little is known about a person's inner attitudes, values, and beliefs.
2) It provides examples of how positive attitudes like having a "can do" mindset, knowledge, hard work, and skills can contribute significantly to one's life.
3) The document shares quotes about the power of positive thinking and attitudes in achieving goals and happiness. Maintaining a positive outlook is emphasized as key to success.