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At the time Doyle wrote his short essay, researchers in Sweden had just gone through extensive research of hearts. From 1998 to 2013 researchers studied specifically heart attacks and the moments leading up to them. They focused on the time of day, symptoms beforehand, and season to try and understand the inner workings of one of the most complicated organisms in the human body.

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Doyle's purpose in writing this essay is to encourage the audience of middle aged adults to live life to the fullest, to treasure it, and love others as much as you can. He uses the example of a hummingbird, representing a fast paced life and living dangerously, contrasting this statement with that of a tortoise's slower, calmer life, focusing on the differences of both and comparing them to the way humans live their lives according to the constructs of society.

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Brain Doyle, in his 2012 short essay "Joyas Voladoras", motivates the audience of middle aged adults to treasure every moment and live life to the fullest to live with a more positive outlook on how humans love and go through their daily lives. Doyle compares the lifespans of the two opposing animals, describes the appearances and functions of a whale heart and classifies/divides the number of chambers in the hearts of differing animals to emphasize the idea of love. Doyle discusses the importance of life in order to ensure the audience recognizes that treasuring and cherishing the bad parts of life is just as important as the good because only "so much heart is held in a lifetime". Doyle speaks to the audience in a somber, yet philosophical/thoughtful tone to establish a comfortable setting between the author and audience and to set a sense of trust with one another.

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The author, Brian Doyle, dedicated his essay to his son who had a life-threatening heart condition which almost ended his life. This essay is an excerpt of a book written about the doctor who saved his son's life. As a proud follower of the Catholic church, Doyle was unafraid to voice his opinions and include his faith in many other writings. Born into a family of 8 children and having a journalist for a father led him to find his passion in writing as well as develop his caring personality. On May 27, 2017 in Oregon, he sadly lost his life to long term brain cancer.

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Doyle's now world famous essay started as a collection of thoughts and information he had researched due to his son's condition. His son was born with a congenital heart condition that almost killed him and required multiple surgeries and operations over many years. Wanting to understand his son's condition and be knowledgeable about the heart's functions, Doyle invested his time in creating this intellectual and powerful essay.

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Throughout the text, Doyle's three organizational patterns are used to better structure his idea. In the beginning he uses Compare and Contrast when differentiating the lives of hummingbird and a tortoise, the bird being fast paced and tortoise being slower and calmer.
He describes the heart of a whale emphasizing the vast mystery of the heart and the patterns of life of different organism.
At the end of his short essay, Doyle uses classification and division when speaking about and listing the number of chambers in the hearts of multiple animals. He did this to shed light on the numerous differences that each organism holds, to exemplify how unique  the life of every organism is.

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The author establishes his credibility when explaining
how hummingbird "arteries are stiffer and more taut. They have more mitochondria in their heart muscles—anything to gulp more oxygen." to show his extensive research and knowledge in the parts and functions of the heart

Doyle appeals to the audience's sense of innocence reminiscing "When young, we think there will come one person who will savor and sustain us always; when we are older we know this is the dream of a child," demonstrating how time can harden and scar one's heart despite precautions taken to protect it.

The author reveals that "Every creature on earth has approximately two billion heartbeats to spend in a lifetime." expanding on the idea of spending one's lifetime strategically and without regrets regardless of the time spent on Earth

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Features (devices - figurative & syntactical, word choice, sentence structure)

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Features (devices - figurative & syntactical, word choice, sentence structure)

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Doyle uses anaphora when describing, " each thunderous wild heart ... each mad heart silent, a brilliant music stilled." to highlight how unique and special the heart of a hummingbird is to the world.

When describing, "the war against gravity and inertia, the mad search for food, the insane idea of flight", Doyle magnifies the individualism and incredibility of the hummingbird's ability to  function as such a small, complex organism.

He uses asyndeton when expanding on the lack of knowledge about, "the mating habits, travel patterns, diet, social life, language, social structure, diseases, spirituality, wars, stories, despairs and arts of the blue whale" to exemplify another distinctive animal that is underappreciated and under-researched.

The author utilizes anaphora to discuss, "So much held in a heart in a lifetime. So much held in a heart in a day, an hour, a moment.", validating how much emotion the heart carries throughout one's life and how it can have positive effects on surrounding people.

Doyle illustrates a heart, "patched by force of character, yet fragile and rickety forevermore" in an antiphrasis to reinstate the idea that, "no matter how ferocious the defense and how many bricks you bring to the wall", the heart will always be effected by the events occurring constantly in one's life.

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In the beginning, Doyle expresses his ideas in a philosophical tone describing "when [hummingbirds] are starving, they retreat into torpor, their metabolic rate slowing to a fifteenth of their normal sleep rate, their hearts sludging nearly to a halt, barely beating," expanding his research on the hearts of hummingbirds. This quote shows his access to higher level resources and knowledge over hearts.

In the last paragraph Doyle shifts to a somber tone analyzing that "We open windows to each but we live alone in the house of the heart. ... Perhaps we could not bear to be so naked, for fear of a constantly harrowed heart". The shift signifies the inevitable suffering accompanied by life experiences and shows the audience the pessimistic reality of living with a heart.

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The audience is middle aged adults who have lost the meaning and passion of life. He refers to the audience as "We" when speaking of a child ideology to indicate past experiences, showing wisdom built up through the years.