2.reasons to act that come from within a character
Intrinsic motivations come from inside or within. A person's intrinsic motivation usually revolves around the pride and joy they feel after doing a job well done. That personal satisfaction and purpose pushes the character to continue to make good choices or work hard. Extrinsic motivation are factors that encourage a character that are outside of the character. For example, earning money or some physical reward would be extrinsic motivation for doing a good job.
This means success is a verb and the related part of speech success is not a verb; in this case, success is a noun. Another test for verbs is to use the word in question in different verb tenses. If the sentence still makes sense, the word is a verb.