Lucretius did not deny the existence of god

Lucretius

Lucretius did not deny the existence of gods either, but he felt that human ideas about gods combined with the fear of death to make human beings unhappy.

He followed the same materialist lines as Epicurus, and by denying that the gods had any way of influencing our world he said that humankind had no need to fear the supernatural.

Quotations On The Nature Of Things

This terror, then, this darkness of the mind,
Not sunrise with its flaring spokes of light,
Nor glittering arrows of morning can disperse,
But only Nature’s aspect and her law,
Which, teaching us, hath this exordium:
Nothing from nothing ever yet was born.

Fear holds dominion over mortality
Only because, seeing in land and sky
So much the cause whereof no wise they know,
Men think Divinities are working there.

Meantime, when once we know from nothing still
Nothing can be create, we shall divine
More clearly what we seek: those elements
From which alone all things created are,
And how accomplished by no tool of Gods.”

Whilst human kind
Throughout the lands lay miserably crushed
Before all eyes beneath Religion- who
Would show her head along the region skies,
Glowering on mortals with her hideous face-
A Greek it was who first opposing dared
Raise mortal eyes that terror to withstand,
Whom nor the fame of Gods nor lightning’s stroke
Nor threatening thunder of the ominous sky
Abashed; but rather chafed to angry zest
His dauntless heart to be the first to rend
The crossbars at the gates of Nature old.

And thus his will and hardy wisdom won;
And forward thus he fared afar, beyond
The flaming ramparts of the world, until
He wandered the unmeasurable All.

Whence he to us, a conqueror, reports
What things can rise to being, what cannot,
And by what law to each its scope prescribed,
Its boundary stone that clings so deep in Time.

Wherefore Religion now is under foot,
And us his victory now exalts to heaven.

Reason is a goal that often eludes pure faith.