You can make a difference in other people's lives and your life along the way.

change
enjoy
enrich
sacrifice

Enjoy

Explanation:

You can make a difference in other people's lives and enjoy your life along the way.

When it comes to making a difference n other peoples life, it does not mean that you can not enjoy your life while doing it. If it soothes you and makes you happy, then doing what you love is the best.

It does not mean that in order to change someone else's life, you need to sacrifice your own or change your own. Just enjoy making people happier and satisfied with their lives and your life would change in a good way.

in this part of the declaration it refers to the point when american people didn't recognize the british domain and   breaks the political bands with britain, they forced a respectful separation.

mankind was created and entitled equally with rights   which were life, freedom and the seeking for happiness.

if im not mistaken its a. collective emotional arousal