Give paragraph effect through CSS

How to give paragraph effect to my paragraph using CSS?

For example:

               This is my paragraph. This is my paragraph. This is my paragraph. 
This is my 开发者_StackOverflow社区paragraph. This is my paragraph. This is my paragraph. This is my paragraph. 
This is my paragraph. This is my paragraph. This is my paragraph. This is my paragraph. 
This is my paragraph. This is my paragraph. This is my paragraph. This is my paragraph.
This is my paragraph. This is my paragraph. This is my paragraph. This is my paragraph. This is my paragraph. This is my paragraph. This is my paragraph. This is my paragraph. 
This is my paragraph. This is my paragraph. This is my paragraph. This is my paragraph.
This is my paragraph. This is my paragraph. This is my paragraph. 

I'd like the padding like in the first line.

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You can try the text-indent property.

p { text-indent: 1em; }

See http://reference.sitepoint.com/css/text-indent

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Try this

p:first-line { padding-left:10em; }