TITLE: a good text for a first course in mathematical logic
QUESTION [5 upvotes]: in last two months , i asked many people about good text for first mathematical logic . 
after that a chose some text , first order mathematical logic , angelo magrais ,  
it is ok but the text uses dotty system , this system of writing is not fine for me , so i thought in changing the text and study from another text . 
or , i need some essays or topics to be fammillar with dotty system , 
let us talk about the first option , changing the text , 
i read about , a concise introuduction of mathematical logic by Wolfgang Rautenberg ..
and also about , mathematical logic by Ebbinghaus .. 
but i read some comments says that these two text is not excellent for a first course and the learner must study first from simpler text then go to study from these text . 
but i don't know what are these simpler texts ! , so , i'm very confused . 
i also read some first sections from , mathematical logic part 1 by Lascar and Cori . 
so my question is , which texts are excellent for first course in mathematical logic ? 
and why ? 
which topics should be covered in this first course ? 
is any of the texts which i mentioned is suitable for first course or not ?  
i really hope that you can help , i'm very confused about the good text - or texts - which i should start from . 
thanx !

REPLY [2 votes]: One possible resource, and frequently used for a first course in mathematical logic, is Herbert Enderton's A Mathematical Introduction to Logic. It seems fitting for a first course. I very much liked the text.  You can preview the text book, and its table of contents, at the given link.
Please also see this earlier post for a number of recommendations:

Good books on Mathematical Logic