Praise be to Allah.
If what is meant is summoning the spirits of jinn or others, this is not permitted, because it can only be achieved by means of shirk. If what is meant is nourishing the soul by believing in Allah, His Messengers, His angels, His Books, the Last Day and in the divine decree, both good and bad, then this is what Islam requires of every Muslim and asks him to nourish this belief. And Allah knows best.
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