well i see it very simply, i hope i can explain it in away that is easily understood.
the diffrence between living IN him, and living FOR him.
anyone can live "FOR" god, trying to please him, doing things in his name, doing things you think will make him happy, doing things you think your supposed to do, doing all kinds of things "FOR" god.
but to live IN god (is not some superspiritual thing that you have to search and find a dark and hidden meaning to)
First to lay some foundation for understanding,
jesus said he was "in" the father, that he and the father were one, that he was "in" the holyghost. many people in the bible did things "in" the holyghost or "in" the power of the holyghost.
jesus was not the father, and he was not phsysically inside the father, and walking around on earth at the same time, wouldnt that be confusing.
jesus was simply talking about his relationship with the father, his fellowship with god, jesus had a very strong prayer life, he was always in prayer, he was always talking with the father, he and the father were closer than anyone had ever been. like to best friends who tell each other everything, and know each other fully, and are "one" in a figurative sense. like a child and her newborn baby are "one" in relationship, like a husband and wife are "one" speaking of the intamicy of their relationship together, they are in each other and a part of each other, if one left the other a very large part of their lives would be lost, because they had been so close.
i know this is very elementary, and doesnt seem like it could be applied the complicated and superspiritual world of the bible.
but an easy way of explaining how to be "in" god is
"having a relationship with god, where you do things together, and you who have no power in yourself but simply use his power and accomplish all things "in" him, or "with" him"
like jesus said to his disciples
"... i will be WITH you, even unto the end of the world"
he is saying to his disciples whom loved him dearly, and were hurt to see him go. "im not leaving you, ill still be hear for you, ill still be with you, ill never leave you"
jesus is here with is, living with us.
to be "in" christ is speaking of relationship.
you need to talk to god, walk with god, have conversation with god, laugh with him, cry with him, hes a real person who wants to really know you personally.
picture yourself walking along, you and god, side by side, having conversation, and he says "hey, see that man, lets go help him"
and you say, "ok god, lets go" and as he is there by your side, his power in the situation will make the miracle happen.
but its you and god, going through life, doing everything together, and you having a relationship with him, relationships come from communication and fellowship.
god is not some thing or person who sends you commands from heavon down to earth, and tells you to go over their and do his will and return and tell him how you did. and hes not some thing that has left you with a list of "must do's and donts" and will return one day to see how you did.
thats why hes called the "lover" of our souls, lovers are people with a very emotional, conversational, one on one, very intimate relationship.
just as a lover is actually in the same bed as his/partner, god the lover of our souls, is actually in the same place as we are and longs for fellowship and relationship with us.
sorry, if i get to talking about god, i cant shut up, hehe.
well, about your question on the change in lifestyle from being saved to staying saved.
well,
getting saved isnt just something that doesnt require personal action or commitment to action, it does.
becuase rom 10.9-10 says we are saved by faith and confessing him as lord of our lives.
yes faith, beleiving in him, is a vital part, but beleiving in his existence and works and truth is not all it takes, you must also "confess him as lord" of your life. lord meaing
CONTROLLER.
to be saved, you have to beleive, and commit that you will live your life by his will.
(though i do understand that god has grace on many issues, and many people get genuinely saved without ever realising that god has a will and plan of obedience for their lives afterwords)
but when you get saved, your supposed to realise that, when you got saved, you gave your life to him, and when you did, you agreed to live by his rules and standards.
there is an element of work in being saved. it is conforming your life to the will of god.
and that isnt a salvation by works message, it is realising that no you cannot work your way to heavon, and that gods grace is the only way there, but that doesnt change the fact that you do have to obey god and do what he says now that he has shown you that mercy and grace, and yes you do. becuase that is the commitment you made to him.
it seems that people preach "work, work, work" to stay saved and it doesnt sound right.
but the thing is, you only got saved, because you accepted his grace and commited to live by his rules. thats how you get saved.
when you no longer live by his rules, but live by satans ways, which is turning your back on god, you are disqualifying yourself from salvation. now i agree that salvation isnt worked for anyway, that it is by grace, but god can only put that grace on your life when you choose to live by his rules, leaving sin behind. becuase sin, blocks you from god, and he cannot dwell in the presence of it.
see?
you must "work" as you said, to keep your salvation, becuase if you dont do what is right, then your sinning, and banning yourself from god. and making god offlimits to you, and yourself off limits to god. losing, or forfeiting your salvation, leaving it.
though you do keep in mind that his mercy is everlasting, and his mercy was the only way you got to this place anyway.
but now that mercy is applied, you must commit your life and actions to him. becuase if you sin, he has to leave.
there is an element of works in getting saved, and staying saved.|
i know this creates alot of other questions, about once saved always saved, and sin after salvation already being covered or not mattering anymore, but well i said what i wanted to say and those werent the questions asked.
i hope that made some sense to you.