The way you glow through my blinds in the morning 1 It makes me feel like you missed me. Kissing my forehead to help me out of bed. Making me rub the sleepy from my eyes. Are you asking me to come out and play? 5 Are you trusting me to wish away a rainy day? I look above. The sky is blue. It's a secret, but I trust you too. If it wasn't for you, I could sleep forever. 9 But I'm not mad. I want breakfast. 11
Upon first receiving this poem after Sayori hands it to the player in the first act, it innocently appears to be nothing more than Sayori's stream-of-consciousness as she woke up and got out of bed earlier that day. The main character even makes the connection that she had procrastinated until the morning before school to start her poem, which she admits is true.
Later in the game, however, her action of getting out of bed takes on greater significance. It is revealed that due to depression, she struggles to find motivation to even leave her bed every morning, explaining her perpetual lateness. In the same scene, she talks about her altruistic intentions behind inviting the main character to the literature club; so he can make new friends and and eventually stop caring about her, allowing her to suffer in isolation without bearing the guilt of hurting those who value her well being. These revelations draw connections between the sunshine and the main character. Sayori's reason to leave her bed and go to school the day that she wrote this poem was so that she could supplement the main character's first experience sharing his poetry with the rest of the literature club, which would be the first step of providing her with the comfort that he is moving on without her, metaphorically "kissing [her] forehead to help [her] out of bed"(3).
The fact that Sayori compares the main character to sunlight rather than the sun itself emphasizes how much he means to her, for being the embodiment of sunlight, he metaphorically illuminates her entire world. There could also be significance in that as sunlight instead of the sun, the main character's current relationship with Sayori is distant compared to how close they were when they were children. Therefore, the closeness of their past friendship is as distant as the sun, which Sayori can only experience shimmers of. The sunshine's faith in her to "wish away a rainy day"(6) could reflect Sayori's personal commitment to improve the lives of her friends, including the MC, as much as she can. In the next line, she sees that "The sky is blue"(7), meaning that her efforts have paid off, that her attempt to convince the MC to join the literature club was successful. She continues to say that while "It's a secret... [, she] trusts you too"(8), which means that she knows that the MC cares about her as well.
Sayori's third stanza claims that without the sunshine from her blinds, she "could sleep forever"(9). She says in the next line that despite the implicitly promising solace of eternal slumber, the sunshine's presence doesn't upset her. Maintaining the assumption that the MC is represented by sunshine in this poem, it is clear that Sayori values the MC as the only reason she is awake, therefore the only thing she has to live for. This could also be a double entendre which slightly breaks the fourth wall, because the MC, and by proxy the player, is the only reason that the game is running and character, Sayori, is "awake".
Her last line about wanting to eat breakfast, in addition to the MC's condescending lines about not wanting to leave her bed out of laziness, serve as red herrings to convince the player of the deceptive innocuousness of this poem, when in reality, it is an introspective and encrypted cry for help foreshadowing Sayori's true state of mind and suicide later in the game.