2 Corinthians 1:17-20 was this design therefore the effect of levity? or do I design first one thing, and then another, as it best suits my worldly interest?

Mace⁽ⁱ⁾ ¹⁷ was this design therefore the effect of levity? or do I design first one thing, and then another, as it best suits my worldly interest? ¹⁸ God is my witness, I never prevaricated with you. ¹⁹ for what I, and Timothy, and Silvanus preached concerning Jesus Christ, the son of God, is not inconsistent, but invariably the same. ²⁰ for all the promises of God do center in him, and are verifyed by him to the glory of God by our preaching.