SQL & PL/SQL

I am using UTL_SMTP package of Oracle. This passes the TO, FROM, MESSAGE ..... parameter

However Im having trouble on the Message part. I put the Message as a variable that contains this statement:

THIS IS MY CODE:

l_message :=
'The quick brown fox jumps over the lazy dog. '||
'The quick brown fox jumps over the lazy dog. '||
' '||
'The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. ';


OUTPUT:
The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog.


DESIRED OUTPUT I WANT :

The quick brown fox jumps over the lazy dog.
The quick brown fox jumps over the lazy dog.

The quick brown fox jumps over the lazy dog. The quick brown fox jumps over the lazy dog.