the effect will be disheartening

Never – no, never – go about the house in a worn-out dress, a housecoat without a belt, or with your hair uncombed just because no one is going to see you. You will see yourself in a mirror, and the effect will be disheartening.

Milo, Mary Jo. Marshall, Jean King. 1951. Family Circle's Complete Book of Beauty and Charm. New York. Garden City Books. p.352

we can become fascinating ducklings

If we cannot turn into swans, we can become fascinating ducklings. 
The Seventeen Book of Fashion. 1967 Triangle Publications. The Macmillan Company. p. 15

when you don't expect it

Try to catch a full-length walking view of yourself when you don’t expect it – say, in a plate-glass shop window.

Lane, Janet. 1947 Your Carriage Madam. New York. John Wiley and Sons.p. 57

no one was born to be fat

Your figure is the direct result of your daily habits. No one was born to be fat.

Drake, Debbie. 1961. Debbie Drake's Easy Way to a Perfect Figure and Glowing Health. Englewood Cliffs New Jersey. Prentice-Hall. p. 22

 

not one woman in a hundred

Not one woman in a hundred brushes her hair as much as she should.  

Cocks, Dorothy. 1935. Help Yourself to Beauty: A Modern Woman's Practical Guide. New York. Harper and Brothers Publishing. p. 187