Let us presume that you have a problem.
There is something, which is called ”to sleep on it”. What happens is, that your conscious mind, which doesn't understand the problem, in order altogether to be able to fall asleep, must disentangle from the problem, and after having released itself therefrom, it achieves larger clarity.
Now the subconscious, or deeper layer, begins to project itself to the conscious mind, and when you awake the problem is quite simple solved.
So, the conscious mind, the upper layers of the consciousness, must be clarified, in order to, that the mind can be silent, so that it can receive hints or suggestions from the hidden.
The problem is that we aren´t calm.