Partial answer.
1
Our greatest glory is not in never falling, but in rising every time we fall.
How to solve:
Start from upper right corner backwards and in a spiral.
2.
Life is really simple, but we insist on making it complicated.
How to solve:
Similar to one, only this time the spiral starts in the middle.
For the rest:
The rest seemed at first more or less scrambled (although the 3rd had some recognizable pattern) so I searched for more quotes of Confucius which would match the letters. And the 5th was solved by IAmInPls.
3.
It does not matter how slowly you go as long as you do not stop.
Another bad drawing to show the pattern:

4.
The will to win, the desire to succeed, the urge to reach your full potential... these are the keys that will unlock the door to personal excellence.
How to solve:
TAHLETWHIELSL
ETAORWEITNHTE
HKEEDYESSTIHR
AETTWOISLULCU
CNELEODCTKHTE
HUERDGOEOTROT
ROEPAECRHSYOO
NUARLFEUXLCLE
PLOLTEENNCTEI
- Thanks to @IAmInPLS
Everything has beauty, but not everyone sees it.
The pattern : (mad Paint skills, be careful.)

Author of the quotes:
Confucius