I found these words from Henri Nouwen . It is exactly what I needed!
The Spirit Will Speak in Us
When we are spiritually free, we do not have to worry about what to say or do in unexpected, difficult circumstances. When we are not concerned about what others think of us or what we will get for what we do, the right words and actions will emerge from the center of our beings because the Spirit of God, who makes us children of God and sets us free, will speak and act through us.
Jesus says: "When you are handed over, do not worry about how to speak or what to say; what you are to say will be given to you when the time comes, because it is not you who will be speaking; the Spirit of your Father will be speaking in you" (Matthew 10:19-20).
Let's keep trusting the Spirit of God living within us, so that we can live freely in a world that keeps handing us over to judges and evaluators.