It is not what we say, think or believe which matters most but what God intends.
A child may cover his eyes and say, 'You can't see me'; but despite what he says, and despite the darkness of his own shut eyes, we can see him. He is simply in error -- it is a childish fancy. But we can go further than that. Because we have all met children who have affirmed the same thing, without collusion with each other, we may say that it is a characteristic misunderstanding of a particular age of childhood.
So it is with us. If we have spent our lives under the illusion that, because we cannot see God, He cannot see us, can He not see us? Are we not simply in error? Or, if we have not believed it quite as blatantly as that, perhaps we have lived as if we did, by engaging in all manner of habits of injustice, wilfulness, selfishness and unkindness, not to say worse, as if there were no account to give. Because we were not immediately rebuked we took it as licence to continue, not knowing that we were heaping up wrath against the day of judgment.
There is another way in which we may think of those words. We may have given in to depression all too easily, saying, 'Surely the darkness shall cover me,' when there was no good reason.
Jacob resolved to mourn until the day of his death because he felt the loss of his son Joseph. So acute was his feeling that he refused to be comforted, but the truth of the matter was quite otherwise, for Joseph was very much alive. God had sent him to prepare deliverance.
Because Jacob's disposition was constitutionally of that nature, he repeated his error in the matter of Benjamin. 'Joseph is not, and Simeon is not, and ye will take Benjamin away. All these things are against me.' Joseph and Simeon were both alive and God was actively, though invisibly, bringing deliverance. It was not a bit as Jacob thought. He was in error. So it may be with us. Our sins have been blotted out by the blood of Christ and we have staked our souls on it. But the seas of life are rough and, like Peter walking on the water, we have taken our eyes off the Saviour.
We feel ourselves to be sinking, and the sensation is real enough, but God does not intend to allow us to sink. We would be mistaken to think so.