Oklahoma was shrouded in grief after the deaths of 168 people -- including 19 children -- in a homegrown terrorism attack at the Alfred P. Murrah Federal Building in downtown Oklahoma City.

President Bill Clinton spoke at the memorial service. So did Gov. Frank Keating. But everyone knew who would deliver the sermon and face the hard questions.

That was a job for the Rev. Billy Graham.

"The Bible says … there is a devil, that Satan is very real and he has great power," said Graham, focusing on the 9,000 mourners in the Oklahoma State Fairgrounds Arena. "It also tells us that evil is real and that the human heart is capable of almost limitless evil when it is cut off from God and from the moral law.

 "The prophet Jeremiah said, 'The heart is deceitful above all things and desperately wicked, who can know it?' That is your heart and my heart without God. … I pray that you will not let bitterness and poison creep into your soul, but that you will turn in faith and trust in God even if we cannot understand.  It is better to face something like this with God than without Him."

Graham didn't end those 1995 remarks with an "altar call," urging sinners to come forward and make a profession of faith. But he could have -- even with the president of the United States in the front row.

Then again, Clinton was from the South and attended Graham's 1959 crusade in Little Rock, Ark. The young Clinton was so impressed by the preacher's message, and his refusal to bow to segregationists, that he began sending part of his weekly allowance to the Billy Graham Evangelistic Association.

In the wake of his death this week, at age 99, diplomats, scholars and journalists will struggle to describe Graham's impact via preaching, television, radio, books and other writings. It's hard enough to do the math when discussing his 417 crusades in 185 countries, along with countless other gatherings ranging from presidential inaugurations to tiny youth rallies after his 1938 ordination as a Southern Baptist preacher.

To be blunt, it can be argued that Graham spoke -- in person -- to more people than any other leader in world history.