The happiness of your life depends upon the quality of your thoughts: therefore, guard accordingly, and take care that you entertain no notions unsuitable to virtue and reasonable nature.
— Marcus Aurelius

The things you think about determine the quality of your mind. Your soul takes on the color of your thoughts.
Marcus Aurelius quality quote

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Be a yardstick of quality. Some people aren't used to an environment where excellence is expected.
— Steve Jobs

Tolerance and compassion are qualities of fearless people.
— Paulo Coelho

Success is based upon a spiritual quality, a power to inspire others.
— quality quotation by Vince Lombardi