ASV: whereby, when ye read, ye can perceive my understanding in the mystery of Christ;

BBE: By the reading of which you will be clear about my knowledge of the secret of Christ;

DBY: by which, in reading it, ye can understand my intelligence in the mystery of the Christ,)

KJV: Whereby, when ye read, ye may understand my knowledge in the mystery of Christ)

WEY: By means of that explanation, as you read it, you can judge of my insight into the truth of Christ

WBS: By which when ye read, ye may understand my knowledge in the mystery of Christ,

WEB: by which, when you read, you can perceive my understanding in the mystery of Christ;

YLT: in regard to which ye are able, reading 'it', to understand my knowledge in the secret of the Christ,
