In the beginning God made all things beautiful. How do we know that? We know this is true because of the beauty of God's creation on earth--the flowers, the birds, the trees, the animals. Ugliness only entered in as a result of man's sin. Therefore, we should try to make all things, including ourselves, as beautiful as possible.
If you doubt that, then I ask you: Do you think there is anything ugly in Heaven, the Kingdom of God? Jesus said in The Lord's Prayer "Your Kingdom come" (Matthew 6:10) which means to pray that the earth would become the Kingdom of God. Let us do our best to bring that about--in ourselves, in our homes, in our communities.