“It is not death therefore that is burdensome, but the fear of death.”
De bono mortis, 8, 31.
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Ambrose 10
bishop of Milan; one of the four original doctors of the Ch… 339–397Related quotes

“For it is not death or pain that is to be feared, but the fear of pain or death.”
Book II, ch. 1 http://classics.mit.edu/Epictetus/discourses.2.two.html
Discourses
Variant: For death or pain is not formidable, but the fear of pain or death.

“No evil is honorable; but death is honorable; therefore death is not evil.”
As quoted in Epistles No. 82, by Seneca the Younger

“There is no death without life. Therefore, death depends entirely on life.”
“The fear of death is more to be dreaded than death itself.”
Maxim 511
Sentences, The Moral Sayings of Publius Syrus, a Roman Slave

“And death?
I don’t fear death.
I dread the absence of it.”
Divided by Infinity (p. 195)
The Perseids and Other Stories (2000)