Yusuke

“How long are you going to wait before you demand the best for yourself and in no instance bypass the discriminations of reason? You have been given the principles that you ought to endorse, and you have endorsed them. What kind of teacher, then, are you still waiting for in order to refer your self-improvement to him? You are no longer a boy, but a full-grown man. If you are careless and lazy now and keep putting things off and always deferring the day after which you will attend to yourself, you will not notice that you are making no progress, but you will live and die as someone quite ordinary.
From now on, then, resolve to live as a grown-up who is making progress, and make whatever you think best a law that you never set aside. And whenever you encounter anything that is difficult or pleasurable, or highly or lowly regarded, remember that the contest is now: you are at the Olympic Games, you cannot wait any longer, and that your progress is wrecked or preserved by a single day and a single event. That is how Socrates fulfilled himself by attending to nothing except reason in everything he encountered. And you, although you are not yet a Socrates, should live as someone who at least wants to be a Socrates.”
― Epictetus (From Manual 51)

“Everything is good as it comes from the hands of the Maker of the world, but degenerates once it gets into the hands of man”
― Jean-Jaques Rousseau

“Two things fill the mind with ever-increasing wonder and awe, the more often and the more intensely the mind of thought is drawn to them: the starry heavens above me and the moral law within me.”
― Immanuel Kant, Critique of Practical Reason

“Fill your bowl to the brim
and it will spill.
Keep sharpening your knife
and it will blunt.
Chase after money and security
and your heart will never unclench.
Care about people's approval
and you will be their prisoner. Do your work, then step back.
The only path to serenity.”
― Laozi