For I say, through the grace given unto me, to every man that is among you, not to think of himself more highly than he ought to think; but to think soberly, according as God hath dealt to every man the measure of faith.
Romans 12:3
It’s okay to be confident as long as you know who your confidence is in. The Bible says that man should boast in Christ and Christ alone, for it is Him that gives you strength and power. Every good and perfect gift comes from above. Thus, it is futile to think that any physical attribute or material possession you have comes from any other source but God. That being said, you should be quick to give Him glory for all that he has done. Take pride in nothing as it comes before the fall, but credited it all to His amazing grace.
“Confidence with no outlet equals arrogance”