A.T. Robertson Commentary 1 Corinthians 14:12

"So also ye, since ye are zealous of spiritual [gifts], seek that ye may abound unto the edifying of the church." — 1 Corinthians 14:12 (ASV)

Zealous of spiritual gifts (ζηλωτα πνευματων). Zealots for spirits. So it looked.

That ye may abound (ινα περισσευητε). Purpose clause with the object by prolepsis stated beforehand "for the edification of the church."