You attract into your life what you think about frequently. Most of the thoughts are weak and are not repeated long enough to gain sufficient strength. Weak thoughts, like a weak magnet, hardly have any attractive power.
You have seen how a magnet draws metal objects. A strong and big magnet draws bigger objects, than a small and weak one. Magnets have another peculiar characteristic. One side of the magnet draws, and the other side repels.
A magnet draws toward itself everything made of iron, no matter whether it is a useful object or junk. The mind acts in the same way. It attracts into your life positive and negative situations and events, according to the thoughts that you think. The law of attraction is neutral; it can attract positive or negative situations, according to your predominant thoughts.
Like the magnet, the mind not only attracts, but it also repels. If you doubt your ability to attract a certain object, person or situation into your life, then you repel it with this attitude. Thoughts of incompetence, weakness, fear and inferiority create a repellent force. It is as if you are creating a wind that blows away and prevents certain things to reach you.
This means that you need have no doubts, be full of faith in your abilities, and have a strong desire, in order to make your mind behave like a magnet and create the life you desire.