One to Ten words

The most selfish ONE letter word "I" - Avoid it.
The most satisfying TWO letter word "WE" - Use it.
The most poisonous THREE letter word "EGO" - Kill it.
The most used FOUR letter word "LOVE" - Value it.
The most pleasing FIVE letter word "SMILE" - Keep it.
The fastest spreading SIX letter word "RUMOUR" - Ignore it.
The hardest working SEVEN letter word "SUCCESS" - Achieve it.
The most enviable EIGHT letter word "JEALOUSY" - Distance it.
The most powerful NINE letter word "KNOWLEDGE" - Acquire it.
The most essential TEN letter word "CONFIDENCE" - Trust it.