Converts like newborn children

Question

there is the principle גר שנתגייר כקטן שנולד דמי does anyone know of commentaries on that ? Is it just a legal principle, or does it mean that there is an ontological change (i.e., is the convert just CONSIDERED like a newborn child legally speaking (without precedent legal ties), or is he IN FACT a (spiritually) newly born ?)

Answer 1

Yes, the statement has Halachis implications. For example:

1. Does a convert who had children before converting need to have more children Yevamos 62a
2. Does a child born before conversion prevent the "first born son" born after the conversion from being considered a first born Yevamos 62a
3. Are brothers from before conversion considered brothers Yevamos 97b

But it also says that (at least according to one opinion), a convert is forgiven for all his sins from prior to conversion

Answer 2

It says in the posuk גר שנתגיר a convert that converted now if he was a convert why did he need to convert the wording of the posuk is a bit interesting the explanation is that every convert essentially when he was born had the capacity being one his souls phycie is different it is naturally spirtully intuned in other words god use these Jews as alreathis part of they just have to reveal this part of themselves this is the deeper meaning of that Passage