In chapter 9 of the Gita, Lord Krishna says that fools think he is just a normal human being (having assumed such a form), whereas he is the all-pervading Supreme Being.
My Guru has an amazing purport that immediately follows this.
“Reading the meaning of this verse, we start looking for fools, Ravana etc. among our relatives or friends. No, He is talking about you and me, because it we who have:
1. Vain hopes (that name, fame, wealth will make us happy, finally!)
2. Futile actions, actions without viveka
3. Futile knowledge – any content that takes us away from the Lord”