Contradictory notions:

- The definition of insanity is doing the same thing over and over again, but expecting different results.
- If at first you don't succeed, try, try again.

- Look before you leap.
- He who hesitates is lost.

- Two heads are better than one.
- If you want something done right, do it yourself.

- Nothing ventured, nothing gained.
- Better safe than sorry.

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

- Many hands make light work.
- Too many cooks spoil the broth.

- You can’t teach an old dog new tricks.
- It’s never too late to learn.

Happy Monday.