In this passage, the word 'you' is always plural.

## you … have clothed yourselves in Christ ##

This can mean 1) "you … have become the same sort of person as Christ is" (UDB) or 2) "you … have the same relationship to God as Christ."

## There is neither ##

"There is no distinction between" or "God sees no difference between"

## If you are Christ's then are you ##

"If you are Christ's, then you are"