Contrary to what some people think, Hell is not merely separation from God but instead, Revelation 14:9-11 says, "And the third angel followed them, saying with a loud voice, If any man worship the beast and his image, and receive his mark in his forehead, or in his hand, the same shall drink of the wine of the wrath of God, which is poured out without mixture into the cup of his indignation; and he shall be tormented with fire and brimstone in the presence of the holy angels, and in the presence of the Lamb: and the smoke of their torment ascendeth up for ever and ever: and they have no rest day nor night, who worship the beast and his image, and whosoever receiveth the mark of his name."
The wrath of God cannot be contained by any man. Just the mere thought of being a tiny wax figurine in front of a blast furnace is not enough to describe God's wrath towards the unrepentant sinner. There is a good illustration to how sinners will be before God. Many atheists may not be afraid of God now, they may just laugh His existence off because they do not want Him in their lives but many of them will eat their words on Judgment Day. It may soon become where God will tell them, "My servants tried to warn you about sin and judgment but you said to them not to judge you."