Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Acquisition | knowledge | penance | permanence of the body | constancy | purity |
| --- | --- | --- | --- | --- | --- |
| Impurity | false conception | demerit | attachment | interestedness | falling |
| Expedient | use of habitation | pious muttering | meditation | constant recollection of Rudra | apprehension |
| Locality | spiritual teachers | a cavern | a special place | the burning ground | Rudra |
| Perseverance | the differenced | the undifferenced | muttering | acceptance | devotion |
| Purification | loss of ignorance | loss of demerit | loss of attachment | loss of interestedness | loss of falling |
| Initiations | the material | proper time | the rite | the image | the spiritual guide |
Question:
 what's the permanence of the body where purity is apprehension
Answer:
meditation