But if anything in thy own dispositiongives thee pain, who hinders thee from correcting thy opinion? And even if thou art pained because thou art not doing some particular thing which seems to thee to be right, why dost thou not rather act than complain?- But some insuperable obstacle is in the way?- Do not be grieved then, for the cause of its not being done depends not on thee.- But it is not worth while to live if this cannot be done.- Take thy departure then from life contentedly, just as he dies who is in full activity, and well pleased too with the things which are obstacles.

Consider when thou art much vexed or grieved, that man's life is only a moment, and after a short time we are all laid out dead.

...if a man comes to his fortieth year, and has any understanding at all, he has virtually seen - thanks to their similarity - all possible happenings, both past and to come.

Be cheerful, also, and seek not external help, nor the peace which others give. A man must stand straight, and not be kept straight by others.

After all, what does fame everlasting mean? Mere vanity.

I am called to man's labour; why then do I make a difficulty if I am going out to do what I was born to do and what I was brought into the world for?

The universe is transformation: life is opinion.