External things are not the problem. It's your assessment of them. Which you can erase right now.

Withdraw to the untroubled quietude deep within the soul, and refresh yourself.

No one can lose either the past or the future - how could anyone be deprived of what he does not possess? ... It is only the present moment of which either stands to be deprived: and if this is all he has, he cannot lose what he does not have.

To the wise, life is a problem; to the fool, a solution.

All men are made one for another: either then teach them better or bear with them.

If you do the task before you always adhering to strict reason with zeal and energy and yet with humanity, disregarding all lesser ends and keeping the divinity within you pure and upright, as though you were even now faced with its recall - if you hold steadily to this, staying for nothing and shrinking from nothing, only seeking in each passing action a conformity with nature and in each word and utterance a fearless truthfulness, then the good life shall be yours. And from this course no man has the power to hold you back.

You must become an old man in good time if you wish to be an old man long.