Beauty: The quality present in a thing or person that gives intense pleasure or deep satisfaction to the mind, whether arising from sensory manifestations (as shape, color, sound, etc.), a meaningful design or pattern, or something else (as a personality in which high spiritual qualities are manifest).
My definition: When one finds something or someone, absolutely irrestible despite of others opinions.
Joy: The emotion of great delight or happiness caused by something exceptionally good or satisfying; keen pleasure; elation.
My definition: An unquestionable extreme feeling of happiness.
Pain: Mental or emotional suffering or torment.
My definition: Unbearable misery.