I leave you the best phrases of illusion of great authors such as George Bernard Shaw, Orson Welles, Jean Paul Sartre, Michael Jordan, Albert Einstein, Leo Tolstoy, Socrates or Sigmund Freud.
Maintaining the illusion is one of the keys to overcome difficulties and not collapse before the challenges that occur in life. With it you can always persevere and move on, recharging your mental and physical energy.
You may also be interested in these quotes of hope or these positive ones.