'Form' in the Bible

Did I display any vacillation or caprice in this? Or the purposes which I form--do I form them on worldly principles, now crying "Yes, yes," and now "No, no"?

Not that we are sufficiently qualified in ourselves to claim anything as coming from us, but our sufficiency and qualifications come from God.

And it is no wonder; for even Satan himself is able to take the form of an angel of light.

If I wish to boast, I will not be foolish, because I will be speaking the truth. But I abstain [from it], so that no one will credit me with more than [is justified by what] he sees in me or hears from me.