2 Corinthians 10:9-11

9 I do not want to seem as though I am trying to frighten you with my letters.
10 For they say, "His letters are weighty and strong, but his bodily presence is weak, and his speech contemptible."
11 Let such people understand that what we say by letter when absent, we will also do when present.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.