KJV : For <1063> our <2257> rejoicing <2746> is <2076> (5748) this <3778>, the testimony <3142> of our <2257> conscience <4893>, that <3754> in <1722> simplicity <572> and <2532> godly <2316> sincerity <1505>, not <3756> with <1722> fleshly <4559> wisdom <4678>, but <235> by <1722> the grace <5485> of God <2316>, we have had our conversation <390> (5648) in <1722> the world <2889>, and <1161> more abundantly <4056> to <4314> you-ward <5209>.

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NASB : For our proud confidence is this: the testimony of our conscience, that in holiness and godly sincerity, not in fleshly wisdom but in the grace of God, we have conducted ourselves in the world, and especially toward you.

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NASB# : For our proud<2746> confidence<2746> is this<3778>: the testimony<3142> of our conscience<4893>, that in holiness<41> and godly<2316> sincerity<1505>, not in fleshly<4559> wisdom<4678> but in the grace<5485> of God<2316>, we have conducted<390> ourselves in the world<2889>, and especially<4053> toward<4314> you.