I think this is coming from the Henry Ford quote, which is "Whether you think you can, or you think you can't--you're right."
This quote basically means that what you think you can do is all in your mind and how you perceive yourself. if you think you can do something, then you'll be able to do it. If you think you can't do something, then you won't be able to, because you have already given up in your mind.
Does that make sense?
You have to give us more the question doesn’t make since
Answer:
A noun is a word for a person, place, or thing. (It might be helpful to think of a noun as a "naming word.") There are different types of noun, but all nouns can be classified as either a proper noun or a common noun.
Once we've discussed proper nouns, we will cover common nouns and the nine types of common noun.
