Through the Processes of Jhana does it have a Permanent effect or temporary effect on your life Is Jhana like a meditative absorption state?  I've come across this term.

Is Jhana like a barrier, once broken, you go onto the next barrier, and so on and so on. Is this process a permanent effect on the mind or a temporary effect of the mind? Do you basically start over from stage 1 every time, does your body ever become accustomed to it, and do you have to constantly renew the Jhana over and over in order to progress?
&quot;Jhana is like a meditative absorption state? I've come across this term.&quot;

&quot;[Jhanas are] distinctive meditative states of high concentration in which the mind becomes unified. [...] Jhana is often referred to as an absorption state, since the mind in Jhana is so deeply concentrated that it 'absorbs' into the meditation object.&quot;
Richard Sankman, The Experience of Samadhi

Yes. Jhana also corresponds to &quot;right concentration&quot; (samma samadhi) in the eightfold path (see SN 45.8).
&quot;Like a barrier once broken you go onto the next barrier an so on an so on.&quot;
Yes. There are multiple jhanas. The canon describes a sequence of 4 Jhanas followed by 4 more states (in later commentaries, they are known respectively as Rūpajhānas and Arūpajhānas). The commentarial tradition also expanded on the states that precede the first Jhana (e.g. access concentration).
&quot;Is this process a permanent effect on the mind or a temporary effect of the mind, Do you basically start over from stage 1 every time [?]&quot;
It may affect the mind in many ways, but one doesn't really stays permanently absorbed in Jhana during day-to-day. Reaching a certain Jhana may not necessarily require going through previous jhanas (though it is emphatically advised to perfectly master them in sequence and develop stability instead of trying to &quot;jump around&quot;).
&quot;does your body ever become accustomed to it [?]&quot;
I'm not aware of any body related issues associated with Jhana.
&quot;do you have to constantly renew the Jahana over an over in order to progress?&quot;
I'm not sure what you mean by &quot;renew&quot;, but just like any training that requires repeated practice, mastering jhanas also requires effort and training, specially to reach deeper Jhana states.