Werset 4.404.14.24.34.44.54.64.74.84.94.104.114.124.134.144.154.164.174.184.194.204.214.224.234.244.254.264.274.284.294.304.314.324.334.344.354.364.374.384.394.404.414.42

The ignorant the faithless, the doubting self goes to destruction; there is neither this world nor the other, nor happiness for the doubting.

But the ignorant, the faithless and the doubting perish. For one who doubts, there is neither this world, nor the next, nor happiness.

Krishna describes the opposite condition. One who lacks knowledge, lacks faith and is filled with doubt is ruined. For the saṃśayātman, the person whose very self is doubt, there is no happiness here or beyond. The verse does not condemn honest questioning, which Krishna praised earlier in the chapter, but a corrosive doubt that prevents any commitment or action. Arjuna's paralysis on the battlefield is itself a form of such doubt. Krishna is warning that remaining in that state helps no one.