<ul>The word "for" in this context should be translated "because".<li><b>some spiritual gift in order to establish you</b> - Alternate translation: "some gift from the Holy Spirit that will help and strengthen you."</li></ul>
## that is, to be mutually encouraged among you, through each other's faith, yours' and mine. ##
"I mean that I want us to encourage each other by sharing our experiences of faith in Jesus."