"It is not by muscle, speed, or physical dexterity that great things are achieved, but by reflection, force of character, and judgment"

This quote by Cicero highlights the significance of mental strength and character over physical strength. He is suggesting that physical strength and speed are not the only aspects that add to success. Instead, he thinks that success is attained through reflection, force of character, and judgment. Reflection is the ability to believe deeply and seriously about a situation, while force of character is the strength of one's moral convictions and decision. Judgment is the ability to make sound choices based on careful consideration. Together, these three qualities are important for accomplishing excellent things. They are more important than physical strength or speed, as they are the qualities that will help one make the right decisions and take the right actions. Ultimately, Cicero is highlighting the value of mental strength and character in accomplishing success.