The best answer for this question would be:
Kino in the first chapter is shown to have a reaction with his emotions rather than using his brain in emergencies. The chapter describes Kino as a man who is happy and in love with his wife and family that lives a peaceful life. It backsfires when his baby is poisoned by a scorpion; his reaction was through extreme rage, while Juana finds solutions to keep the baby alive. He does react to danger though but in finding solutions, he let his emotions get through him the most as said in the chapter.