1. Humans are imperfect.
2. People don't know the world.
3. We're all wandering souls.
4. There is never a wrong time.
5. We will protect each other.
6. Our music is our mind.
7. Colors are emotions on paper.
8. A tree is a new beginning and an old friend.
9. Hair is our expression.
10. Playful lips are made of yarn.
11. We are fragile.
12. Our bones are weak, but our minds are strong.
13. Our movements are our way of communicating.
14. Singing is expression.
15. Jealousy is caused by pride.
16. Our world revolves around whatever we want it to.
17. An ugly person has never existed.
18. Our souls are our beauty.
19. Vanity shrinks our hearts.
20. Our minds are our greatest weapon. 

About five words, short. 
Presented as the truth, but provokes an argument
Uses articles "is", "was", "were", etc.

Truism is a statement that tells something that is obvious or already known.