Beauty of woman should be the unfading beauty of a gentle and quiet spirit

1 Peter 3:1-7
Wives, in the same way, submit yourselves to your own husbands so that, if any of them do not believe the word, they may be won over without words by the behavior of their wives, when they see the purity and reverence of your lives.
Your beauty should not come from outward adornments, such as elaborate hairstyles and the wearing of gold jewelry or fine clothes. Rather, it should be that of your inner self, the unfading beauty of a gentle and quiet spirit, which is of great worth in God’s sight.
For this is the way the holy women of the past who put their hope in God used to adorn themselves. 
Husbands, in the same way, be considerate as you live with your wives and treat them with respect as the weaker partner and as heirs with you of the gracious gift of life so that nothing will hinder your prayers.
Wives, too are to submit to their husbands' authority and win over unbelieving husbands by their conduct. (This does not mean they are less important or inferior. Wayne Grudem makes the point that 'Jesus was subject to his parents and to God the Father.') They are to take as their examples, not fashion models but women of faith - women like the matriarch Sarah, who radiates inner beauty. They are not only to live good lives but to be free of fear and worry. Christian husbands, for their part, will show consideration to their wives. In terms of God's gift of new life, husbands and wives are equals. A good relationship is vital, not only for their happiness but for spiritual health too, for prayer withers in an atmosphere of friction.
Why?
Peter told us how to be a good wife and husband. Submit yourselves to your own husbands and your wives and treat them with respect.
Beauty should not come from outward adornments but should be that of your inner self, the unfading beauty of a gentle and quiet spirit.
Beauty is not from outward adornments but from the inner heart and conduct. Outward adornments will fade away. 
How?
Husband and wife should respect each other, submit themselves to each other as Jesus submit to the Father.