How does one have the gall to say "ארוממך א-להי המלך" - I will exalt Hashem the King. Who are WE to exalt the King???
Explained the Chiddushei HaRim: After we say תהילה לדוד - these praises were said by Dovid - then we can say ארוממך א-להי המלך. It is not us - we are just repeating the words of Dovid...
ודפח"ח!!