James Allen said this quote

All that man achieves and all that he fails to achieve is the direct result of his own thoughts. His suffering and happiness are evolved from within. As he thinks, so he is. As he continues to think, so he remains.

~ James Allen

A strong man cannot help a weaker unless the weaker is willing to be helped, and even then the weak man must become strong of himself; he must, by his own efforts, develop the strength which he admires in another. None but himself can alter his condition.

~ James Allen

A man's mind may be likened to a garden, which may be intelligently cultivated or allowed to run wild; but whether cultivated or neglected, it must, and will, bring forth. If no useful seeds are put into it, then an abundance of useless weed seeds will fall therein, and will continue to produce their kind.

~ James Allen

Let a man radically alter his thoughts, and he will be astonished at the rapid transformation it will effect in the material conditions of his life. Men imagine that thought can be kept secret, but it cannot; it rapidly crystallizes into habit, and habit solidifies into circumstance. Bestial thoughts crystallize into habits of drunkenness and sensuality, which solidify into circumstances of destitution and disease: impure thoughts of every kind crystallize into enervating and confusing habits, which solidify into distracting and adverse circumstances: thoughts of fear, doubt, and indecision crystallize into weak, unmanly, and irresolute habits, which solidify into circumstances of failure, indigence, and slavish dependence: lazy thoughts crystallize into habits of uncleanliness and dishonesty, which solidify into circumstances of foulness and beggary: hateful and condemnatory thoughts crystallize into habits of accusation and violence, which solidify into circumstances of injury and persecution: selfish thoughts of all kinds crystallize into habits of self-seeking, which solidify into circumstances more or less distressing. On the other hand, beautiful thoughts of all kinds crystallize into habits of grace and kindliness, which solidify into genial and sunny circumstances: pure thoughts crystallize into habits of temperance and self-control, which solidify into circumstances of repose and peace: thoughts of courage, self-reliance, and decision crystallize into manly habits, which solidify into circumstances of success, plenty, and freedom: energetic thoughts crystallize into habits of cleanliness and industry, which solidify into circumstances of pleasantness: gentle and forgiving thoughts crystallize into habits of gentleness, which solidify into protective and preservative circumstances: loving and unselfish thoughts crystallize into habits of self-forgetfulness for others, which solidify into circumstances of sure and abiding prosperity and true riches.A particular train of thought persisted in, be it good or bad, cannot fail to produce its results on the character and circumstances. A man cannot directly choose his circumstances, but he can choose his thoughts, and so indirectly, yet surely, shape his circumstances.

~ James Allen