1.
Effective leaders are made, not born. They learn from trial and error, and from experience.
Colin Powell
Skilful commanders are fashioned, not innate. They develop through experimentation and blunder, and from involvement.
2.
Don't be afraid to scrape the paint off and do it again. This is the way you learn, trial and error, over and over, repetition. It pays you great dividends, great, great dividends.
Bob Ross
Do not be scared to start over and keep trying. This is how you develop, by experimenting, again and again, repeating the same process. It will produce great rewards, tremendous benefits.
3.
Most species do their own evolving, making it up as they go along, which is the way Nature intended.
Terry Pratchett
4.
Only ... from personal experience [can a man] take the necessary measures without a preliminary process of trial and error.
Karl Donitz
5.
Mathematics is not a deductive science - that's a cliché... What you do is trial and error, experimentation, guesswork.
Paul Halmos
6.
Music is really all about experimentation and lots of trial and error. It's just mind-numbingly boring until you hit on something that works well.
Martin Gore
7.
Ideas do not always come in a flash but by diligent trial-and-error experiments that take time and thought.
Charles K. Kao
8.
In spite of some bad experiences, I'm a firm believer in the trial and error method of learning.
Andy Rooney
9.
You don't learn from a situation where you do something well. You enjoy it and you give yourself credit, but you don't really learn from that. You learn from trial and error, trial and error, all the time.
Suzanne Farrell
10.
All I have learned through trial and error is to stay alert and aware, especially God smiling @ our silliness.
Brennan Manning
11.
Children do not have to learn that streets are dangerous places by potentially fatal trial and error.
Keith Henson
12.
signs are an extremely personal language that we develop throughout our lives, by trial and error, until we begin to understand that God is guiding us.
Paulo Coelho
13.
Sure, science involves trial and error. Scientists refine theories each day. But as they do, they help us grasp more clearly the wonders of the world and the universe.
Tony Snow
14.
I'm trying figuring out how to be the best person I can be. But it's been a process of trial and error.
David Arquette
15.
You show me a successful complex system, and I will show you a system that has evolved through trial and error.
Tim Harford
16.
I have found through trial and error that I work best under duress. In fact
I work only under duress.
Edward Abbey
17.
Be fearless and don't be afraid of failure. There is no better way to learn than through trial-and-error.
Nick D'Aloisio
18.
We proceed by doubt, by trial and error, by resisting the impulse to lunge after certainty.
William Deresiewicz
19.
In my early career, I look at that time as a series of trial and error and learning as I go.
Julia Stiles
20.
So, it's a continual process of trial and error and then I find things and I throw it out and start again, but I keep writing it over again.
Edward Hirsch
21.
Progress through trial and error depends not only on making trials, but on recognizing errors.
Virginia Postrel
22.
The fossil record implies trial and error, an inability to anticipate the future, features inconsistent with an efficient Great Designer (although not with a Designer of a more remote and indirect temperament)
Carl Sagan
23.
Every great idea emerges out of a process of trial-and-error experimentation.
Scott D. Anthony
24.
In contrast, markets - oft mythologized as "natural" are the most unnatural things going. Libertarians will tell you "market laws are laws of nature", what baloney. Markets - and the other great modernist cornucopian tools - are magnificent wealth generating machines, built ad-hoc, through trial and error, constantly fine-tuned and refined, tinkered, adjusted.
David Brin
25.
I always wished to be a better planner. It seems more elegant, while my trial and error process is more akin to someone scratching an awful case of poison oak.
Joshua Mohr