For you have heard of my previous way of life in Judaism, how intensely I persecuted the church of God and tried to destroy it.
NIV
You have heard of my earlier career and former manner of life in the Jewish religion (Judaism), how I persecuted and abused the church of God furiously and extensively, and [with fanatical zeal did my best] to make havoc of it and destroy it.
AMP
For ye have heard of my conversation in time past in the Jews' religion, how that beyond measure I persecuted the church of God, and wasted it:
KJV
