Those who think they can advance in yoga by leaving their body completely inert, their vital asleep and their mind in a kind of stupefaction (for often, what they call “silence” is just stupefaction), get completely upset, you may be sure, when an experience comes to them. They lose their head, they do extravagant things or otherwise something very unfortunate happens to them…. One must have a solid well-balanced body, a well-controlled vital and a mind organised, supple, logical; then, if you are in a state of aspiration and you receive an answer, all your being will feel enriched, enlarged, splendid, and you will be perfectly happy and you will not spill your cup because it is too full, like a clumsy fellow who does not know how to hold a full tumbler. It is like that, you see, it is as if you had a small vase there, quite small, which will remain small if you do not take care to make it bigger; then if all of a sudden it is filled up with something which is too strong, everything overflows!
[The Mother: CWM 4]