There’s a special light that protects those who pray in a Minyan (group of at least 10 men).
The morning prayer include three times where we connect to ‘Holiness’, ‘Kedusha’. First one while we are in the world of Briah, Creation, where we join the angels saying Kadosh, Kadosh, Kadosh in front of the Holy one Blessed be He. We sit during this part to honor and support the angels without competing with them. We are in the process of elevating to the world of Atzilut, whcih is the silent prayer and we need the support of the angels.
During the repetition of the Amidah, silent prayer, and as Rabbi Ashlag explains, we became friends with the angels and when we say again Kadosh, Kadosh, Kadosh we receive light of Chokmah in the place of the angels.
The third time we say Kadosh, Kadosh, Kadosh is when we go down from Atzilut to Briah, continuing the Light of Chokmah. Normally we are not allowed to draw this light down but the special light that we mentioned at the beginning protects us with the light of Yessod and chassadim that conceal the light of Chokmah, allowing us to draw it into our lower level.
The Kedusha with the angels gives us permission to enter upper gates and connect to higher light.
Our prayers were developed by the sages mostly after the destruction of the first Holy Temple. We needed tools to compensate for the lack of connection with the Holy Temple. Every part of the prayer is important in order to achieve higher lights and greater spiritual benefits.
Daily Zohar # 2370 – Teruma – Kadosh Kadosh Kadosh