en_tn/luk/21/14.md

Jesus continues speaking to his disciples about the future.

resolve in your heart

"make up your mind" or "decide firmly"

not to prepare your defense

"not to figure out what you will say in order to defend yourself against their accusations"

words and wisdom

"words of wisdom" or "wise words." (See: rc://en/ta/man/translate/figs-hendiadys)

I will give you words and wisdom

"I will tell you what wise things to say"

which all your adversaries will not be able to resist or contradict

This means "Your adversaries will not be able to argue against these words or say that these words are wrong."