“The time for action is now. It's never too late to do something.”
Quoted as Sandburg in Stop Whining! Start Selling!: Profit-Producing Strategies for Explosive Sales Results (2003) by Jeff Blackman, but without citation of original source; this is elsewhere attributed to Antoine de Saint Exupéry, but also with no original sources cited.
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Carl Sandburg 62
American writer and editor 1878–1967Related quotes

“You can never do a kindness too soon, for you never know how soon it will be too late.”
Culture
1860s, The Conduct of Life (1860)
Variant: You cannot do a kindness too soon, for you never know how soon it will be too late.
“The future is now. It's time to grow up and be strong. Tomorrow may well be too late.”
Source: Reasons to Be Pretty

Un Art de Vivre (The Art of Living) (1939), The Art of Leadership
"I Am a Cabaret" (1972), p. 203
The Good Word & Other Words (1978)