It is natural for people to be attracted to beautiful things. It follows, therefore, that most women desire nothing but to look beautiful. That is why they cannot help but spend vast sums of money on cosmetics and fashionable clothing. They are interested in nothing but their looks. However, they should be reminded that beauty is only skin-deep.

Instead, they should pay more attention to their character because when you have character, you have class. And that is what gives one inner beauty.

Beauty is only skin-deep. 美色是肤浅的
class 格调
be attracted to/by   The children are always attracted to/by toy section of department stores.
He is very diligent. Therefore, it follows (that) he will pass the test. 
That is the reason... = That is why... = That is the reason why....
cannot help doing = cannot help but do 不得不做
make-up 化妆(动作)   cosmetics 化妆品
look  n.相貌
marcia 进行曲
character 品格,气质
He is not a good student. Instead(On the contrary), he is a bad student.
inner beauty   outer beauty