“They glanced at one another like tigers taking measure of a menacing new rival. But in this kind of jungle you could never be sure where the real danger lurked.”

The Class (opening words)

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Do you have more details about the quote "They glanced at one another like tigers taking measure of a menacing new rival. But in this kind of jungle you could ne…" by Erich Segal?

Erich Segal22

American writer 1937–2010

Laura Riding Jackson (1901–1991) poet, critic, novelist, essayist and short story writer

Description of Life (Targ Editions, 1980)

“But I'll always love you, and I'll always miss you and I'll never forget that It's okay to put dragons in the jungle and tears on a tiger”

Sharon M. Draper book Tears of a Tiger

Source: Tears of a Tiger

“Stick to it, boy,
Through the thick and the thin of it!
Work for the joy
That is born of the din of it.
Failures beset you,
But don't let them fret you;
Dangers are lurking,
But just keep on working.
If it's worthwhile and you're sure of the right of it,
Stick to it, boy, and make a real fight of it!”

Edgar Guest (1881–1959) American writer

Stick to It, first stanza.
Source: The Passing Throng (1923)

“The menace was Bolshevism. It was difficult to make people realize this, they think it is a fanatical obsession, but it was a real danger of which people should take account. It was as great a phenomenon in history and its menace to the national states of Europe as great as the migration of peoples, e. g. Mohammedan. It was necessary for Western Europe to stand together as a block against this danger.”

Adolf Hitler (1889–1945) Führer and Reich Chancellor of Germany, Leader of the Nazi Party

Remarks to David Lloyd George (4 September 1936), quoted in Thomas Jones, A Diary with Letters. 1931-1950 (Oxford University Press, 1954), p. 245
1930s

“Wherever there is danger, there lurks opportunity; wherever there is opportunity, there lurks danger. The two are inseparable.”

Earl Nightingale (1921–1989) American motivational speaker

“I would dare say that today this species is facing a very real and true danger of extinction, and no one can be sure, listen to this well, no one can be sure that it will survive this danger.”

Fidel Castro (1926–2016) former First Secretary of the Communist Party and President of Cuba

University of Havana address (2005)
Context: I would dare say that today this species is facing a very real and true danger of extinction, and no one can be sure, listen to this well, no one can be sure that it will survive this danger.
Well, the fact that the species would not survive was discussed about 2,000 years ago. I remember that when I was a student I heard of the Apocalypse, a book of prophesy in the Bible. Apparently, 2000 years ago someone realized that this weak species could one day disappear.