See Proverbs 19:8. etc.
We preach Christ Crucified, a "skandal" to the Jews and folly to the Greeks.
Please see the word scandal in the first phrase of the linked article and continue reading for more context and more material to reflect on.
If you noticed Vermeule's reference to Aquinas and wondered, what is that? As it happens, there is an Aquinas website on neocities.Aquinas in English