Do you love your life? Do you consider your birth and existence as a gift of life? If your answer is in the affirmative, then beyond question, you will have unconditional love for yourself.
Having love and respect for yourself, makes you speak to others with respect and dignity. Likewise, for any reason, if you happen to hate yourself, you would see no value in your life as well as in anyone else’ lives.
Furthermore, to not have the love for yourself would mean similar as being absolutely ungrateful by declining a gift which has been given to you so generously. As a consequence of not having self-love, you would not have any eminent dreams or goals in life, in which case you would have less substantial reasons to work, learn or even to gain wisdom and to stay healthy.