Algunos nacen con estrella y otros estrellados. This dicho (saying) roughly translates to "Some are born with a star, while others are born starry." It refers to the Mexican belief that good luck is a matter of fate, something you are born with or not. Mexicans attribute their good or bad luck to a greater force, to God's will, even to the stars in the sky. Being born with a star is a blessing. While some gain their luck through fate, Laura Davila believes even more in faith, virtue, and purpose. While there are some people who are born with a natural gift for magic, there are many others for whom life itself pushed them toward using magic. The best brujos and magical people are not those who necessarily started off in perfect circumstances but those who looked at magic as a skill to be mastered.

Spells are the focus of Mexican Magic. The book features magical recipes, spells, tips, and advice for a wide variety of intentions, including love, lust, sex, good luck, money, protection, commerce, gambling, justice, pregnancy, travel, education, and more. Although the spells may be practiced by anyone, their flavor is Mexican, as they are deeply rooted in Mexican folk beliefs and magic. Davila also shares direction on how to be a magical person and live a magical life, with examples given from some influential Mexican historical and spiritual figures.