Background

Ravi Zacharias is a Christian Apologist.

For a long time, I thought that meant someone who is apologizing.  Later on I found out that it is actually anchored on a greek word, Apologia.

http://en.wikipedia.org/wiki/Apologetics
Apologetics (from Greek ἀπολογία, “speaking in defense”) is the discipline of defending a position (often religious) through the systematic use of information. Early Christian writers (c. 120–220) who defended their faith against critics and recommended their faith to outsiders were called apologists.

The term apologetics etymologically derives from the Classical Greek word apologia. In the Classical Greek legal system two key technical terms were employed: the prosecution delivered the kategoria (κατηγορία), and the defendant replied with an apologia. To deliver an apologia meant making a formal speech or giving an explanation to reply and rebut the charges.

https://en.wikipedia.org/wiki/Christian_apologetics
Christian apologetics (Greek: ἀπολογία, “verbal defence, speech in defence”) is a field of Christian theology which aims to present a rational basis for the Christian faith, defending the faith against objections. Christian apologetics has taken many forms over the centuries, starting with Paul the Apostle in the early church…

Biblical Basis
https://en.wikipedia.org/wiki/Christian_apologetics

Several biblical passages have historically motivated Christian apologetics. R. C. Sproul, quoting the First Epistle of Peter (^{[1 Pet3:15]}), writes that “The defense of the faith is not a luxury or intellectual vanity. It is a task appointed by God that you should be able to give a reason for the hope that is in you as you bear witness before the world.” The verse quoted here reads in full: “but in your hearts honor Christ the Lord as holy, always being prepared to make a defense to anyone who asks you for a reason for the hope that is in you; yet do it with gentleness and respect.”

I hope you have a good Internet Access and you can listen in on some of the sermons / discussions listed below.

References

References – Apologia

• Christian apologetics
  https://en.wikipedia.org/wiki/Christian_apologetics

• Ravi Zacharias
  http://en.wikipedia.org/wiki/Ravi_Zacharias

References – Ravi Zacharias – Videoes

1. Ravi Zacharias – Sunday Talk interview with Nicky Gumbel
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     • Video #1
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2. Princeton University Open Forum Q&A
   • Profile
     • Ravi Zacharias and Vince Vitale spoke to an overflow crowd on the evening of April 4th, 2013 at Princeton University titled, “Why I’m Not An Atheist.”
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     • Video #1
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3. Ravi Zacharias – Temptation of Christ
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4. Dr. Ravi Zacharias – Liberty University Baccalaureate
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5. Is Tolerance Intolerant? Pursuing the Climate of Acceptance and Inclusion (@ UCLA)
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6. Ravi Zacharias – How to measure your choices
   • Profile
     • This is a sermon by Ravi Zacharias at Lee University (Cleveland, TN) U-Church October 09, 2011. This event was co-sponsored by Lee University and the Broad Street United Methodist Church. All respective rights go to the owners, uploaded for nonprofit educational purposes.
   • Videos
     • Video #1
       Demoted On:- 2020-April-27th
       Video #1
     • Video #2
       Channel:- notransgression
       Published On:- 2014-August-28th
       Added On:- 2020-April-27th
       Link
7. The Hiddenness of God
   • Profile
     • Dr. Zacharias addresses a question on the hiddenness of God during the question and answer session at the Arizona State University Open Forum. Close to 10,000 people joined international speakers Ravi Zacharias, Michael Ramsden, Stuart McAllister, and Professor John Lennox of Oxford University as they spoke at this one-night only open forum at Arizona State University to address the intellectual assumptions of atheism while contrasting the validity of the Christian faith. For the speakers’ messages and the entire Q&A, visit http://store.rzim.org.
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       Channel:- Ravi Zacharias International Ministries
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8. Ravi Zacharias – Life’s toughest questions
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     • Video #1
       Demoted On 2019-May-24th
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     • Video #3
       Channel:- notransgression
       Added On :- 2019-May-24th
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9. Ravi Zacharias – Jesus Among Gods
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10. Ravi Zacharias – Absolute truth in relative terms
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      • Video #1
        https://www.youtube.com/watch?v=eiBoCDwPMG0
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11. Ravi Zacharias – How do we challenge this generation?
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      • Video #1
        Demoted On:- 2020-April-27th
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12. Ravi Zacharias – Lewende Woord
    • Profile
      • Living Word Montana in South Africa ( Link )
      • “Ravi Zacharias sermon start at 29:07” – Jared Gardner
    • Videos
      • Video #1
        Channel:- Lewende Woord Brummeria
        Published On:- 2013-August-7th
        Video #1“