Jesus says, “Only those who are like children will enter the kingdom of my God.” I also say the same. Move back to the point where civilization started to corrupt you, to the point where education started to corrupt you, to the point where society entered. Move to the point where you were unsocial or pre-social, when there was no society forced on you; you were innocent and pure. Move to that point. Unless you move back to that point again, barriers will remain.
Become children again. In the process you will feel madness, because you are throwing out all your adult values: education culture, religion, scriptures, manners. You are throwing out everything. You are moving back to the point where you were yourself, no society had yet corrupted you.
The whole process will look like madness. It is not. It is a catharsis, and if you can go through it, you will come out saner, less mad. The madness will be thrown out. You will become more pure, more sane.
Now, be ready for the meditation.