Super Genius wrote:
Just interested to know since i converted back to Judaism.
To an advance the discussion in a Torah shiur, Rabbi Moshe Feinstein,
would often try to "interpret" the intention of an improperly phrased question addressed to him.
I will try this method here.
Perhaps, Super Genius, was originally a Gentile, who converted to Judaism.
After some time, he left the observance of Torah and converted to another religion.
Later, he decided, he really did believe in Judaism and wants to return to it.
The question he had, might be, does he need a new conversion?
Answer,
if you were a sincere convert at the time of your conversion, which includes the commitment to observe the Torah entirely and had the conversion done properly by means of a proper rabbinical court of legitimate rabbis and not phoneys such as so-called reform and conservative rabbis, then your conversion remains valid, even if you temporarily went bad.
Then you would not need a second conversion.
Should you take upon yourself, extra stringencies or self inflicted punishments for your past evil actions or at least dip in a mikva?
In previous generations, the rabbis were more prone to suggest, but not require, extra stringencies or self inflicted punishments to help the atonement or Teshuva process.
In later generations, given the weaknesses of modern society, the rabbis are usually more inclined to suggest more and fixed Torah study as a correction measure.
A higher level of repentance is to make a public fixing in the very area that you had your fall.
So for example, when Julius Ciss, who was once active in the Jews for Jeersus movement (the name of the christian deity was intentionally mispelled) returned to Judasim, he ended up becoming the head of the Canadian branch of Jews for Judaism, a countermissionary organization
see
http://www.israelnationalnews.com/Radio/News.aspx/2744 for details
I am giving you a general outline. You should however consult with a rabbi, because in some cases, mere ideological repentance is not enough. For example, if you were a robber, you would have to return the money, in many situations to the victim. Again, consult a rabbi for details.
Furthermore, if let's say you were involved in Jews for Jeersus and you fear any contact with them, even for countermissionary purposes might pull you down, then stay away entirely from these evil influences.