What, then, is paganism? The answer is not
really difficult. Paganism is that view of life which finds the
highest goal of human existence in the healthy and harmonious
and joyous development of existing human faculties.
Very different is the Christian ideal. Paganism is optimistic
with regard to unaided human nature; whereas Christianity
is the religion of the broken heart.
– John Gresham Machen: Christianity and Liberalism (1923)