It means to improve your thinking ability and cognitive level through continuous learning and knowledge accumulation. "Arm your mind with knowledge and light up your life with wisdom" is an inspirational sentence, in which "Arm your mind with knowledge" emphasizes the importance of knowledge. By constantly learning and mastering all kinds of knowledge, we can broaden our horizons, expand our thinking and improve our ability to solve problems.
"Light up life with wisdom" emphasizes the role of wisdom, which is the ability to guide people to make correct decisions and choices, and can help people better understand themselves and the world around them, seize opportunities, avoid risks and achieve life goals.