The author reflects on how their brain has changed since starting their career as a software engineer, feeling less intellectually stimulated and more prone to distraction. To counter this, they took a vacation focused on learning and reading, where they rediscovered their love for maths and physics. The author found this experience to be rejuvenating and hopes to continue learning and growing. The vacation allowed them to slow down and engage in activities that stimulated their mind, such as reading and solving maths problems.