In a secular world where gender roles are being redefined, and society is therefore being affected, it is necessary to reinforce the teaching of biblical masculinity in boys. In this important task, not only fathers have a transcendental role, but mothers are also a fundamental part of teaching masculinity to their sons. In Blue is for Boys, Karla de Fernández develops how the gospel is the only means to mold the hearts of little ones and rescue them from the clutches of the world so that they may be men according to the divine plan.