The topic "Positive Thinking" gives a conceptual meaning, Positive thinking is one type of energy to one and all. Generally at childhood parents are strengths for children's but it says they are protecting them and the kid is going to know each and every thing that parents are going to tell, make the kid learn and get habituated towards not to commit any mistake in coming days.
So, ultimately the thinking of children's vary. So, basically parents are strengths to children's and make children's think positive at different situations.
example of my self experience while going for exams generally every one may read hours together but before my mother used to give me strength and that make my mind fresh and thinking about the exam will be positive that i can write answer for any type of question and that strengthens our mind a positive thinking. "Strength is directly proportional to positive thinking".
We cannot 100% say that we are going to have a bright future, obviously but in certain occasions where if we are cautious that we are positive towards the goal also we cannot reach. Not all are perfect in this real world. At least we can say positive thinking make our mind a super special thinking and activate our mind. Every one will say think positive but why not negative? There will be some occasions here negative thinking also gives good results. It doesn't mean that don't think negative, some times it may happen even without knowing we'll do negative but when the result is good we feel that we are thinking positive.
Human psychology if anything comes good through bad also they feel it's good. and finally i want to make a statement that think positive and make your mind free and strengthen your career.