A Conversation with Ward Cunningham (2003), To Plan or Not To Plan
Context: To worry about tomorrow is to detract from your work today. Time you spend thinking about tomorrow is time you're not spending thinking about what to do today. The place you leave in the code because you think you'll need it tomorrow, is actually a waste of time today — and a liability tomorrow. It does more harm than good.
“I don't worry about my tomorrow, I want to make my today better. Because if I get better today, tomorrow will automatically get better. So think about your today, who has seen tomorrow.”
Related quotes
“Today was a difficult day. Tomorrow will be better”
Variant: Today was a difficult day.
Tomorrow will be better.'
-Mr. Slinger
Source: Lilly's Purple Plastic Purse
Address to the UN General Assembly (21 September 2006), quoted in BBC News (22 September 2006) " Hamas rejects Abbas unity pledge http://news.bbc.co.uk/1/hi/world/middle_east/5370628.stm
“I'm scared. What will tomorrow bring? It has to be better than today. It has to.”
Source: By the Time You Read This, I'll Be Dead
“Don't worry about the world coming to an end today …… It's already tomorrow in Australia.”
Came from an online quiz falsely attributed to Schulz http://www.snopes.com/glurge/schulz.asp. However, in the 13 June 1980 Peanuts strip http://www.gocomics.com/peanuts/1980/06/13, Marcie does say "I promise there'll be a tomorrow, sir. In fact, it's already tomorrow in Australia."
Misattributed
“I didn't get where I am today by worryin' about how I'd feel tomorrow.”
They Call Me Tater Salad
“Remember, today is the tomorrow you worried about yesterday.”
Source: How to Stop Worrying and Start Living (1948), p. 237. Part 8 : How I Conquered Worry,