Set Your Intention

Ibn Abbas narrates from RasulAllah Salla Allahu alayh wasallam:

“Verily Allah has written down the good deeds and the evil deeds”, and then explained it [by saying]: “Whosoever intended to perform a good deed, but did not do it, then Allah writes it down with Himself as a complete good deed. And if he intended to perform it and did perform it, then Allah writes it down with Himself as from ten good deeds up to seven hundred fold, up to many times multiplied. And if he intended to perform an evil deed, but did not do it, then Allah writes it down with Himself as a complete good deed. And if he intended it [i.e., the evil deed] and then performed it, then Allah writes it down as one evil deed.”

• Is this Hadith or Quran? What is the difference?
  What is 40 Hadith Nawawiyya?
  Who is Ibn Abbas?
  Does Allah account us equally on good and bad deeds?
  Are we accounted for intentions ? or actions only?
  How can we work on the Hadith?