Revelation 3:17-18: “You say, ‘I am rich; I have acquired wealth and do not need a thing.’ But you do not realize that you are wretched, pitiful, poor, blind and naked. I counsel you to buy from me gold refined in the fire, so you can become rich; and white clothes to wear, so you can cover your shameful nakedness; and salve to put on your eyes, so you can see.”
I hope you see how deceived we can get. We can actually have a completely opposite opinion about ourselves than the Lord has. It is wise to always be humble and pray that the Lord would clothe us spiritually, open our eyes to let us see and give us spiritual riches. Then we have much better chances of not being deceived.