The results you get by adopting and practicing positive thinking is not an overnight task. It is something that you gradually grow by conditioning the mind until it becomes a natural occurrence.
It is very similar to any activity that requires some sort of practice to refine its skill and make you better at it.
To give you some contrast, take for example a person who solely focuses on all the negative aspects of everything they do.
This person complains just about everything, is always talking about how bad life is and tends to self-sabotage his or her personal image.
As this person continues on this negative path, it becomes so natural that it is difficult to convince this person that there are better things in life, and that he or she has extraordinary capabilities to achieve and make very fruitful things happen…