True Secret Can Be Left In The Open
So, what can I add further, to make this known to you? For it is well known that if you are wise, you can understand this entire order from hints.
יׁ הׁ וׁ הׁ
אׁ
יָ הָ
יֻ הֻ
יֵ הֵ
אָ
אֻ
אֵ
וָ הָ
וֻ הֻ
וֵ הֵ
אִ
יִ הִ וִ הִ
If you feel that your intellect is weak in wisdom, or in kabbalah, or that your thought is strongly bound to the vanities of time, do not pronounce the Name, lest you sin more.
In any case, if after completing this, you see a form before you, prostrate yourself before it immediately. And if you hear a voice, either loud or soft, and want to understand what it is saying, answer it immediately. Say: "Speak my Lord, for your servant is listening." If you experience great terror, which you cannot bear, even in the middle of the pronunciation, prostrate yourself immediately.~Abraham Abulafia (1240 - c.1290 C.E.), The Light of the Intellect.