He was considered by many to be one of the most influential Christians of his day. At his memorial service US Vice President Mike Pence said, "In God gave us the greatest Christian apologist of this century."
He was raised in a nominally Anglican home in Delhi, India and considered himself an atheist up until his unsuccessful suicide attempt at age 17. As he lay in a hospital bed, words of Jesus from John 14 were read to him: "Because I live, you also will live."
These words inspired him to surrender his life to Christ and he vowed to leave no stone unturned in his pursuit of truth.
At age 26 he became an itinerate evangelist with The Christian and Missionary Alliance and was ordained in 1980.
In 1983, Billy Graham invited him to address a gathering of over 4,000 evangelists in Amsterdam.
In 1984, he founded Ravi Zacharias International Ministries (RZIM), the purpose statement of which states "The primary mission of Ravi Zacharias International Ministries is to reach and challenge those who shape the ideas of a culture with the credibility of the Gospel of Jesus Christ.
Distinctive in its strong evangelistic and apologetic foundation, the ministry of RZIM is intended to touch both the heart and the intellect of the thinkers and influencers of society through the support of the visionary leadership of Ravi Zacharias.
Our vision is to build a team with a fivefold thrust of evangelism, apologetics, spiritual disciplines, training, and humanitarian support so that the mandate of I Peter 3:15 might be fulfilled: to set apart Christ in our hearts as Lord and always be prepared to give a reason for the hope that is within us, with gentleness and respect, all for the glory of God."
RZIM has grown to a global team of nearly 100 speakers with offices throughout the world in the United States, Canada, Latin America, Africa, the United Kingdom, Spain, Romania, Turkey, India, Singapore, Hong Kong, Austria, Germany, Macedonia, and Switzerland.
He frequently said that he wanted to "help the thinker believe and the believer think." He earned a Master of Divinity degree at Trinity Evangelical Divinity School and taught at the Alliance Theological Seminary in New York.
He received 10 honorary doctorate degrees in recognition of his public commitment to Christian thought.
As an international speaker and prolific author, his defense of the Christian faith reached millions.
He hosted the radio program Let My People Think that was syndicated to over 2,000 stations in 32 countries. He authored more than 30 books including A Shattered Visage: The Real Face of Atheism, Can Man Live Without God?, Jesus Among Other Gods, and The Grand Weaver.
His books have received multiple awards and have sold hundreds of thousands of copies worldwide. In 2004 his ministry established the Oxford Centre for Christian Apologetics and launched Wellspring International, the humanitarian division of the ministry.
In 2014 The RZIM Academy, an online apologetics-training curriculum, was created.
In 2017 the Zacharias Institute, an apologetics training facility, was established in Atlanta, Georgia. His numerous speaking engagements around the world included many secular universities, the Lenin Military Academy in Moscow, the White House, the United Nations, and Angola Prison in Louisiana.
He was noted for answering the arguments of skeptics with gentleness and respect, giving the reason for the hope that he had, but recognizing that at the other end of the question was a person made in the image of God.
He said "I have reminded myself over the years that behind every question is a questioner and behind every questioner is a network of assumptions, hurts, struggles, and often prejudices."
The prisoners of Angola prison built his coffin. He wrote in Seeing Jesus from the East, "These prisoners know that this world is not their home and that no coffin could ever be their final destination. Jesus assured us of that."
In 2018, he told the story of standing with his successor in front of Lazarus's grave in Cyprus. The stone simply reads, "Lazarus, four days dead, friend of Christ." Zacharias turned to his successor and said if he was remembered as "a friend of Christ, that would be all I want."