**Jesus taught us;
"And he said to them, "Go into all the world and preach the gospel to the whole creation" (MK 16:15). **
While argument, or more preferably charitable & civil debate, are challenging, i believe the Holy Spirit may be at work here.
i drifted away from the Catholic Faith for many years precisely because i didn't know what i believed & why i believed it.
**After much pain & suffering, i finally opened my heart to Jesus!
Initially, i attempted to disprove Catholic beliefs because it was so much easier to be a cafeteria catholic or better yet a non-denominational protestant & pick & choose only the easy teachings & be my own "pope!'
In the process of trying to disprove the teachings i disliked, i read Sacred Scripture daily, spent many hours in prayer, read the Catechism of the Catholic Church (CCC) twice from cover to cover, it is a surprisingly clear & understandable resource! (search CCC here; scborromeo.org/ccc.htm, & found many great resources like CA & listened to wonderful apologists like Fr. Corapi, Dr. Scott Hahn, Steve Ray, Fr. Barron & many more!**
A few tips for dealing with atheist intellectuals. Avoid using Catholic teaching to defend Catholic teaching!
i try to use natural or moral arguments. The clearest example to me starts with the argument for God. We live in an perfectly ordered universe with infinite variety.
The atheist's "religion of random choice" is far less possible (i would argue it is impossible!), than belief in a Perfect, Loving & Infinitely Merciful God who created everything!
Don't expect someone with a huge ego to publicly agree with your arguments. Just plant the seeds & let the Holy Spirit work in them!
Sancta Maria, Mater Dei, Ora Pro Nobis Peccatoribus!