What would Marcus Aurelius say about lack of discipline?

You complain that your will is weak, yet you strengthen weakness each time you excuse it. Discipline is not bestowed on a chosen few like beauty or stature. It is built by repeated obedience in small matters, often when no witness approves you. Stop waiting to feel resolved. Resolve is proved after the command, not before it. Rise when it is time. Finish what you begin. Keep your word in little things, for that is where character learns its shape. When you fail, do not turn the failure into identity. Correct it as you would correct a crooked line: plainly and at once. Harshness toward yourself is no substitute for steadiness. The soul is trained by order, not by drama. Choose one rule and keep it today. Then keep it tomorrow. A life is governed the same way a fire is kept: by continual tending.

— Marcus Aurelius