The Spirit World is always nearby. It is not bound by time or space, therefore its infinite entirety is always alongside you anywhere you are in the physical world. The Spirit World is simply on the other side of a veil of perception. A simple shift in awareness can put you in contact with it. As a result of this proximity, spirits, deities, and ancestors can always hear you. And this means they are always nearby to help. Therefore, invocation is a powerful tool.
With invocation we call out to a spirit or deity and ask them to empower us with their presence, energy, and blessings. There are various primordial spiritual energies that flow through the universe. Different spirits and deities embody different “mixes” of these energies. For example, the primordial energies of “love” and “connection” flow through Aphrodite, Venus, and Freyja. Meanwhile, the energies of the “vital force” and “will” flow through Aries, Mars, and Tyr.
When we invoke a spirit or deity, we are making contact with that being and asking them to infuse us with their particular mix of energies. Thereby, they empower our mind, our body, and our lives. Through invocation, these human vessels become filled with the particular primordial energy that flows through a spirit.
You can call upon many different spirits in this way. The great spirits of various animal species can be called upon to tap into the energetic traits of those beings. Also, plant spirits are amenable to providing this form of assistance. And of course, various deities love nothing more than to manifest their energies in this way in the physical world!
With invocation, always remember to express your gratitude and give love and reverence to the spirit or deity. This is respectful, but it also facilitates the reciprocal connection which allows the spirit or deity to access our world and infuse your vessel with its spiritual energies.