In a world that exalts external beauty you may be tempted to find security in looking pretty/handsome. No amount of outward beauty will give you the happiness you desire like a growing inner beauty that comes from a relationship with God.
"But the Lord said to Samuel, “Do not consider his appearance or his height, for I have rejected him. The Lord does not look at the things people look at. People look at the outward appearance, but the Lord looks at the heart.”" 1 Samuel 16:7
"Charm is deceptive, and beauty is fleeting;
but a woman who fears the Lord is to be praised." Proverbs 31:30
"Better a patient person than a warrior, one with self-control than one who takes a city." Proverbs 16:32
"For physical training is of some value, but godliness has value for all things, holding promise for both the present life and the life to come." 1 Timothy 4:8