Timothy Joseph O'Mahony,
Catholic Encyclopedia
(1913)
“ Even as a form of divine acclaim its force was intensified, the feeling it evoked deepened, the ideas it suggested widened and elevated, and, above all, purified under the spiritualizing influence of Christian thought. As that thought's supreme expression of thanksgiving, joy, and triumph, "Alleluia" assumed a wider and deeper, a higher and holier, meaning than it earlier had in the liturgy of the Hebrew people. ”

