“Every action, every thought, every feeling, contributes to the education of the temper, the habits, and understanding.”
Education continues through everyday conduct: repeated thoughts and actions train emotional responses, habits, and practical judgment even outside formal study.
Source details
Character, Chapter I, “Influence of Character,” Project Gutenberg #2541. It immediately follows the discussion of small acts and daily discipline, with Smiles describing action, thought and feeling as continuously educating temper, habits and understanding.