subject: The Importance Of Positive Self Affirmations [print this page] In order to address the importance of self affirmations, one must first know the definition of the word 'self'. The dictionary defines 'self' as the true nature of a person. It is the 'self' which makes one person different from other people. This might be termed 'the individuality of a person'. It may be said that 'self' is the very essence of who we are. 'Self' is the "I", which is the distinguishing facet of our very existence.