Avinu Malkeinu

Avinu Malkeinu:

Avinu - A father can't sleep at night because he is worried about his individual child.

Malkeinu: A king is completely immersed in making sure that his nation as a whole is safe, sound and prosperous.

Hasehm is both, Avinu, our Father, on an individual level. And Malkeinu, our king, who takes care of us on a national level.