3. Love is motivating, attachment is tedious
Mutual growth makes a successful relationship. You motivate your partner and get support in return. People who are attached to each other feel that their relationship is encumbering. Both partners keep growing and developing only if they sincerely love each other. They constantly improve themselves.
4. Everlasting love VS transient attachment
Time is powerless against love. Love is everlasting. It transforms but never ends. It becomes deeper while attachment is a rather superficial phenomenon. People who are attached to each other and feel no love are unable to make their bond last forever.