「believe」と「believe in」の意味と違い

Do you know the song” don’t stop belivein’ “?
This belivein’ is mean …believing or believe in?
Workin’ is working
Livin’ is living rigrth?
Don’t stop belivein’
って曲がありますが、
この「’」って略語のためですか？
Believe inか
Bleivingの略か
歌詞をみてると
Believe inだとおもったにですが。。。
どうでしょうか？

I feel ‘ in ‘ has connection to ‘ en-‘ so much.
For example,’ Enrolling in ‘,’ Enter in ‘,’ Entrance in ‘ and so on.
Therefore,It is impossible to understanding ‘ in ‘ deeply as feelings without understanding word origin of ‘ en-‘.
The word origin of ‘en-‘ is the meaning below.
1. “to cause (a person or thing) to be in” the place, condition, or state.
2. “to confine in or place on”
3. “to cause to be in”
4. “to restrict” in
Every previous meanings are
connected to ‘IN’.
I added value its examples for 1.to 4.below.
1. ‘ Thanks for Enrolling In the organization. ‘
2.’ My deep affection is Enshrined In my heart ever. ‘
3.’ I always Encourage him In the way of life. ‘
4.’ This confidential letter is Enclosed In the envelope.’
Moreover,’ en-‘is also attached to verbs in order to make them
transitive,or give them a transitive marker.
And,additionally,I feel that you have so emotional and sensitive feelings about ‘ in ‘ on your
explanation.
I think the key marker is not ‘ in ‘ but the feelings of ‘ en- ‘ that is included in ‘ in ‘.
I mean that you could have impression someting that is not caused yet,when you just heard a word without ‘ en-‘ or ‘in’.
On the other hand,Japanese,like me,does not like to talk about details of privacy to Tird-party people.
So,if you recieved many questions like ‘ How can I say about this to someone? ‘,
you can see that the meaning ‘ someone ‘ has two senses which are ‘ someone special ‘ or ‘ someone Tird-party ‘.
And,The choice which you can see is depends on just your skills.