Two heads are better than one

It is always better to get the view of another than to rely entirely on one's own judgment.

What's done can't be undone

In life there are some things once done or decisions once made cannot be changed; malicious words once uttered or harmful actions once done cannot be taken back.

Don't put all your eggs in one basket

One should not risk everything he has in a single venture.

A burnt child dreads fire

A bad experience or a horrifying incident may scar one's attitude or thinking for a lifetime.

A rolling stone gathers no moss

A person who never settles in one place or who often changes his job will not succeed in life ; one who is always changing his mind will never get anything done.

Barking dogs seldom bite

Those who make loud threats seldom carry them out.

Empty vessels make the most noise

Those people who have a little knowledge usually talk the most and make the greatest fuss.

Habit is second nature

An act done repeatedly and often enough will sooner or later become a habit or second nature.

An ounce of discretion is worth a pound of wit

It is better to be careful and discrete than to be clever.

No news is good news

When there is no news, it is likely that everything is all right.

Every cloud has a silver lining

If you say that every cloud has a silver lining, you mean that every sad or unpleasant situation has a positive side to it. If you talk about silver lining you are talking about something positive that comes out of a sad or unpleasant situation.

Call a spade a spade

If you say that someone calls a spade a spade, you mean that they speak frankly and directly, often about embarrassing or unpleasant subjects.

Great talkers are little doers

Those people who talk a lot and are always teaching others usually do not do much work.

Discretion is the better part of valour

If you say discretion is the better part of valour, you mean that avoiding a dangerous or unpleasant situation is sometimes the most sensible thing to do.

Let not the pot call the kettle black

A person who has a fault should not point out the same fault in another; do not criticize another person as you may have the same weakness.

From the sublime to the ridiculous is only a step

In life things that are noble and magnificent are never far from things that are trivial and laughable. This saying has been attributed to both Napoleon Bonaparte and the French statesman Talleyrand.

Garbage out, garbage in

Often abbreviated as GIGO, this is a famous computer axiom meaning that if invalid data is entered into a system, the resulting output will also be invalid. Although originally applied to computer software, the axiom holds true for all systems, including, for example, decision-making systems.

A reference to the fact that computers, unlike humans, will unquestioningly process the most nonsensical of input data and produce nonsensical output. Of course a properly written program will reject input data that is obviously erroneous but such checking is not always easy to specify and is tedious to write.

GIGO is usually said in response to users who complain that a program did not "do the right thing" when given imperfect input or otherwise mistreated in some way. Also commonly used to describe failures in human decision making due to faulty, incomplete, or imprecise data. For example, a badly written Tex document will look bad because the user did not correctly typeset the TeX source properly. This instance of GIGO could be described in a similar vein to WYSIWYG - what you see is what you get.