As a progressive and evolving being, man is where he is that he may learn that he may grow; and as he learns the spiritual lesson which any circumstance contains for him, it passes away and gives place to other circumstances.
Man is buffeted by circumstances so long as he believes himself to be the creature of outside conditions, but when he realizes that he is a creative power, and that he may command the hidden soil and seeds of his being out of which circumstances grow, he then becomes the rightful master of himself.
That circumstances grow out of thought every man knows who has for any length of time practiced self-control and self-purification, for he will have noticed that the alteration in his circumstances has been in exact ratio with his altered mental condition. So true is this that when a man earnestly applies himself to remedy the defects in his character, and makes swift and marked progress, he passes rapidly through a succession of vicissitudes.
~ James Allen – As A Man Thinketh (1903)