
Leave that which you do not control in the hands of God or nature. But, for that which you do control — your soul, your emotions, your thoughts — learn to steer them in your favour. Every man suffers a great deal in their life, but not all people pity themselves. There is a choice.
… is in control of his own soul. This is all that concerns him — to be at peace with his own spirit. He only fears making chaos of his soul for it is the only power that he has responsibility for. If he loses control, then he loses himself and is powerless to fulfill his obligation to nature.