“‘Holy, Holy, holy, Lord God of Sabaoth; the whole earth is full of His glory!’ ] Perceivest thou, with what dread, with what awe, they pronounce   that Name, whilst glorifying and praising Him? But thou, in thy prayers   and supplications, callest upon Him with much listlessness when it  would become thee to be full of awe, and to be watchful and sober!”
(St. John Chrysostom)