Samarkis -
The pineal is one of a multi-system of glands and hormonal structures in the body - they all affect one another, so stimulating one gland will affect all others.
From my perspective, mystical states result when a 'cocktail' of neurohormones, peptides, chemical messengers, etc. have been released - like chain reactions that can create momentary and even lasting results. Each different combination of ingredients results in different manifestations. You can train yourself, after committed spiritual practice, to bring on the inner shift to other states of being. I often feel a tingling and fizzy feeling in different parts of my brain when I choose to enter some of these states.
I have had results from using vibrational remedies alone or along with meditation, toning harmonic frequencies, using Tibetan bowls, crystal meditation, drinking crystal water etc. But I do often recommend frequency medicine like flower, gem, star essences, and elements from Pegasus Products. I don't have any financial affiliation, but here is a link - I did a
Pineal Gland search for you.
I've used their products with excellent results for all kinds of things. Be sure you understand how best to use them. Interestingly, there is one available - "Forget Me Not" which is supposed to apply to dreams as well.
There has been much written about the blockage of chakras - if the energy is not flowing sufficiently through one, then the others are affected. For instance if the throat chakra is blocked or overstimulated, people will often have thyroid or heart problems as well as a myriad of other problems as a result. Say the throat is blocked, then it stands to reason that the energy in the pineal and pituitary will also be lessened, and the heart chakra have a build up of energy. This is why attending to the whole body/mind/soul is needed.
Opening of the gland is often done with intent, perhaps asking that all energy centers and your entire neurohormone system be balanced and alive, to start. You might also want to deeply understand your reasons for pineal activation - if it is power alone we seek, then it may not be given to us. Pegasus sells "Kether" - a Tree of Life combo essence that attends to the crown chakra. Here it is described:
For receiving impulses & direction from one's Overself. For opening the bridge to multi-dimensional awareness. For activation of the pineal gland, radio receiver of galactic & angelic frequencies. A bringer of humility. A clearer awareness of the inner voice or to channeling. Creeping Thistle, Easter Lily, Holy Thorn, Lotus, Star Jasmine, Yerba Buena, Amethyst, Herkimer Diamond, Hydrogen, Xenon, M5, Polaris.
Blessings, Dakini