Can you name two proverbs which are opposite in meaning?

He who hesitates is lost.
Look before you leap.

Out of sight, out of mind
Absence makes the heart grow fonder

Many hands make light work. Too many cooks spoil the broth. There may be others?

1) a) A silent man is a wise one.
1) b) A man without words is a man without thoughts.

2) a) Actions speak louder than words.
2) b) The pen is mightier than the sword.

3) a) Beware of Greeks bearing gifts.
3) b) Don't look a gift horse in the mouth.

4) a) Clothes make the man.
4) b) Don't judge a book by its cover.

5) a) Look before you leap.
5) b) He who hesitates is lost.

6) a) Many hands make light work.
6) b) Too many cooks spoil the broth.

7) a) Nothing ventured, nothing gained.
7) b) Better safe than sorry.

Don't put all your eggs in one basket.
In for a penny, in for a pound.

The squeaky wheel gets the grease.
Silence is golden.

The early bird gets the worm - Look what happens to the early worm.

There's a few mentioned in the answers to my quiz Rhyme Wise in Quizzyland. Couldn't resist the plug!

Marriages are made in heaven. Marriage is a lottery.

Eye for an eye. [Leviticus]
Turn the other cheek. [Matthew]

Opposites, yes, but not proverbs. One is a principle of law, the other a religious injunction.

To the early bird gets the worm, one could add: but the second mouse gets the cheese. (Pratchett if not earlier)