Premanand Maharaj Ji
I have intelligence, strength and wealth. Why shouldn't I be proud of them?
Ego rests on a falsehood
Your intelligence, strength, knowledge and wealth were given by Bhagwan, so there is nothing to be proud of. Ego lives in falsehood, and knowing the truth ends it.
When someone has given it, praise the one who gave it. Bow to him and ego will not remain. Ego lives in falsehood; there is no ego in truth.