Pretention is not only retrogressive, it could also be destructive.
In your ignorance, when you pretend to be knowledgeable, you will never know.
On your way, when you think you have already arrived at your destination, you will never get there.
In your difficulties, when you do not hope and work for the best, but pretend all is well, you will be stuck permanently in difficulty.
In your lacks and weaknesses, when you pretend to be strong and well endowed, you will grow in poverty and in weakness.
Pretention is a self deception act, learn to avoid it.