In the first reading of The Picture of Dorian Gray, the passage shows readers that the character's motives, actions and feelings are influenced by a desire for eternal youth and beauty. This is evident in the way that Dorian is consumed by his vanity and the way he becomes obsessed with preserving his appearance.
One of the most explicit pieces of evidence from the text is when Dorian says, "I am jealous of everything whose beauty does not die. I am jealous of the portrait you have painted of me. Why should it keep what I must lose?" This shows that Dorian is deeply concerned with maintaining his own beauty and is envious of anything that doesn't have to face the inevitability of aging and decay.
Additionally, Dorian's actions throughout the novel are driven by this desire for eternal youth. For example, he makes a Faustian bargain to trade his soul in exchange for eternal youth and beauty, and he goes to great lengths to conceal the true effects of this bargain from those around him. This shows that Dorian is willing to do whatever it takes to maintain his youthful appearance, even if it means sacrificing his own morals and values.
Furthermore, Dorian's feelings are characterized by a deep sense of vanity and self-absorption. He is constantly preoccupied with his own appearance and spends a great deal of time admiring himself in the mirror. This is evident when Dorian says, "I must always have my mirror, and I will never be alone." This shows that Dorian is consumed by his own vanity and is unable to exist without constantly admiring himself.
Overall, the passage in Reading 1 of The Picture of Dorian Gray reveals that Dorian's motives, actions and feelings are all influenced by his desire for eternal youth and beauty. This is evident through his words, actions and feelings, as well as through the consequences of his obsession with maintaining his appearance.