Who said "The grave is the only certainty we possess before birth."?

This quote is attributed to Edna St. Vincent Millay.

The grave is the only certainty we possess before birth. - Edna St. Vincent Millay

"The grave is the only certainty we possess before birth."

Edna St. Vincent Millay Death

Poet American 1892–1950

"My candle burns at both ends; it gives a lovely light!"

"It is not enough to have had an education any more than it is enough to have eaten a meal."

"I love humanity but I hate people."

"The world breaks everyone, and afterward, many are strong at the broken places."

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."