One of the bespoke emblems of God's nature is the cloud of smoke, symbolizing His sovereign choice to hide or reveal information. Unlike everyday clouds, God's cloud of smoke during the day, paired with a glowing flame of fire at night, echoes the protective and guiding presence seen in the Exodus and wilderness wanderings. This cloud provides shelter and refuge, as in Jerusalem in the last days, where God's glory within the cloud acts as a covering over everything. His presence in the cloud offers protection to His people while discomforting His enemies, as seen in the defeat of the Egyptians at the Red Sea. The cloud of smoke embodies a paradox, serving as a vehicle for revelation when God chooses to communicate, yet also allowing Him to conceal Himself, protecting individuals from harmful knowledge, as when He hides His face from Moses to prevent his death. God's sovereign control over this cloud of smoke determines what is revealed or hidden according to His gracious will.

God's magnificent and terrifying cloud, as described by David in Psalm 18:12, discharges not only rain and fire but also hail and smoke, embodying a supernatural spectacle. This smoke, an element of His cloud, underscores the dual nature of revelation and concealment, reflecting God's presence and glory. In Isaiah 4:5-6, God promises to create in Jerusalem a smoking cloud that serves as a protective covering, offering shade from the daytime heat, a refuge, and shelter from storm and rain. Notably, in Ezekiel's detailed vision of God's portable throne in Ezekiel 1 and 10, while clouds, fires of coal, and lightning are present, smoke is conspicuously absent, possibly withheld by God to allow the prophet a clearer view of the inner workings of His cloud.

In the context of the Day of the Lord, a significant element is the presence of clouds and smoke, often serving as a dramatic signal of God's presence. Isaiah 4:5 describes how the Lord will create a cloud of smoke during the day and a glowing flame of fire at night over Mount Zion, acting as a shelter and refuge for His people in Jerusalem, while His glory covers everything. This imagery echoes the protective pillar of cloud in Exodus 14:19-20, which stood between the Israelites and the Egyptians, providing darkness to one and light to the other, ensuring their safety. Further, in Exodus 19:16-18, Mount Sinai is enveloped in smoke as the Lord descends in fire, with the smoke rising like that of a furnace, accompanied by trembling and thunder, underscoring the awe-inspiring nature of His presence. These clouds and smoke are not ordinary; they are supernatural, often carrying fire and coals, as seen in Psalm 18:10-12, where thick clouds surround Him, serving as His canopy and secret place. Smoke, being inimical to human life by inhibiting breathing and inducing choking, instinctively causes flight, yet God's intervention allows coexistence within His cloud, highlighting its unique nature. In Isaiah 4:5, as rendered in various translations, the smoke and cloud over Mount Zion manifest His glory, protecting and covering the city. This dual role of smoke and cloud as both a cloak and a lens for His glory is evident in multiple accounts, such as Exodus 16:10 and 24:16, where the glory of the Lord appears within the cloud. During significant events like the dedication of Solomon's Temple in I Kings 8:10-11, a cloud, possibly filled with smoke, fills the house of the Lord, rendering the priests unable to minister due to the overwhelming presence of His glory. Similarly, in the Transfiguration account in Matthew 17:5-6, a bright cloud overshadows the disciples, hiding God to protect them from the brightness of His glory, yet facilitating revelation as a voice declares Christ as His beloved Son. In prophetic visions of the Day of the Lord, such as in Zephaniah 1:14-17 and Joel 2:1-2, the day is marked by clouds and thick darkness, symbolizing gloom and distress. Ezekiel 30:3 and 32:7 further associate this day with clouds covering the heavens, darkening the sun and stars, emphasizing the pervasive and transformative nature of His presence through smoke and cloud during this time.

At Mount Sinai, when the Lord descended in fire, the mountain was enveloped in smoke, a vivid sign of His powerful presence. The smoke ascended like that of a furnace, accompanied by the quaking of the entire mountain, underscoring the awe-inspiring nature of His arrival. This smoke, along with the thick cloud, obscured the direct sight of God, protecting the people from the fatal intensity of His full glory. It served as a practical barrier, preventing them from approaching too closely and facing harm from His overwhelming power. The smoke was a tangible reminder of the monumental consequences of interacting with the Great God of the universe, whose presence transforms the material world with fire and trembling. In a contrasting scene, the smoke of judgment rises forever and ever as a testimony to the Lord's righteous actions against corruption. This enduring smoke, mentioned amidst loud voices of praise in heaven, marks the finality of His verdict and the triumph of His reign. It stands as a symbol of His justice, echoing the continuous acclamations of His greatness and authority as King over all.