If we get any positive thought which matches our "Original Sanskar" at birth (our Atma Soul which is pure and divine) then this is defined as true Spirituality.
What happens to our Aatma upon death?
First we all understand there is an Aatma. But here we need to understand types of Atma and connection to Supreme personality of Godhead.
Jīvātmā is the individual, and Ātmā and Paramātmā are Universal.
PARAMĀTMĀ is the Supreme Principle, whatever we call it: God, Supreme Self, Divine
ĀTMĀ may be described as God's ray of light. It is part of PARAMĀTMĀ
JĪVĀTMĀ, the individual soul, is the reflection of the Ātmā within an individual;
The soul that has manifested itself in a form does not identify with its divine essence but rather with its attributes, the physical body, the mind and thoughts
Just as the water in clouds appears to be different to the water in the ocean, in the same way the individual only 'appears' to be different to God. In reality there is no division – it exists externally, in the form and in the qualities. The individual follows the path set down by cosmic law, which has the same validity for all life forms. The aim and purpose of life is in the ongoing development and enlightenment of the consciousness, which achieves its ultimate expression in the conscious union of the individual soul (Jīvātmā) with the divine Self (Ātmā). The opening of the individual consciousness of the Jīvātma to the all-conscious-existence of the Ātma is called enlightenment or realisation.
Atma is the marginal energy of the Ultimate or God or Super soul It's one and the same in quality but differs in quantity, like a drop of water in an ocean. It's the representation of the Almighty.
There is no scientific theory about process of reincarnation
Our Aatma is never subject to birth and death per all Vedas oldest scriptures & still valid for Hindu religion. (Gita 13.23)
The continuous journey of the living entity from one body to another internally or externally under the stringent laws of individual karma is re-incarnation And this process is the Science of self realization
The state of your mind at the time of your death will determine its next journey and the story of Royal King Bharata smitten by his love for a motherless deer is still valid and when born back as a deer and remembering his past life the King achieved Kevalyagyan in just 48 minutes and Supreme blessedness and did not get new birth.
In reality there is no division of Atma and God– it exists externally, in the form and in the qualities. The individual follows the path set down by cosmic law, which has the same validity for all life forms.
Jiva-atma, or the individual soul, is the living entity and Param-Atma refers to the Supreme Lord who expands Himself as the Supersoul, who enters into the hearts of all living entities as well as all atoms. Lord says that He is the representation of Param-Atma in every body. He is different from the Individual soul; He is Parah, Transcendental
In the Thirteenth Chapter of Bhagavad-gita, Krishna explains how He, as the Supersoul, simultaneously exists in the hearts of all beings as the well wisher, the witness to all activities, the maintainer of all things, and the supreme controller within the universe.
In anyone life time, death is inevitable and one will face this whether you like it or not. So the question arises at that time, what is your belief system? Most people again will tread middle waters to go through rituals and formalities and at that time, there is lack of understanding about any deeper meanings and the family who is undergoing this pain are in full of emotions.
Before the article gets to some deeper thoughts on the subject –remember one thing we all do prayers and there is one that comes to mind to all which is "Paratma aane Shanti sachi aape". Firstly there is a meaning to this and secondly if the family at that time is in full trauma and emotion which is understandable and to some degree in state of denial of acceptance –then the process of praying helps them through the coming days to heal some pain. But for the Aatma which has just passed away, if we ourselves are not silent in our own mind and thoughts, then how can we send that message of peace and love to the Aatma? At that time our purpose is to send as many positive vibrations and peace and love to the Aatma. Why?
When a person passes away, their Aatma is still present in the world for 13 days and there is 100% "catching power" of the Original soul to take these into the next journey. By doing religious rituals and prayers and conduct formalities accordance with Hindu customs means that the Original divine soul can catch these thoughts. But if we close our eyes and not so silent within us to send all the positive vibrations, then for the Atma in this period will have some difficulty in catching that energy before it finally leaves the world. The Atma having just left the body will get pure "clarity" as a result of performing OM Shanti pratna and begin to form new Karma and Sanskar on its way to next journey.
The KARMIC account will have its own debits and credits. After our Aatma has departed finally from the world and time elapses, the same catching power it had earlier is depleted though positive energy can still be sent in form of remembrance. All we need to send to the Atma is a simple message – "That we are fine and all well"
If we send any negative thoughts to the Atma, we will create pain for it and in the next cycle of birth, that Aatma will have some difficulty and after the Atma has left us we must never have ill feeling of the departed soul and that is why Sharad is important.
We perform Sharad rituals –why? Beacaue it is also believed that on this day as moon and the earth are very close to each other, the moon rays have certain healing properties of nourishing the body and the soul.
It is also said that the longer we prolong rituals, the longer the Atma will be in some pain having left the body state. In India, the rituals are very quick. However due to some customs and formalities, in UK we have to be practical and do the needful as soon as possible.
Some question if we ignore these rituals –what will happen?
Simple answer is there –if you perform these rituals –then profit is there and Karmic account will be in credit so in next life if the soul is born then may it be in a more heavenly state and if not, then may it go straight to the Supreme personality of Godhead and avoid the misery of repeated births and death cycle. If you ignore this, you may create fear within yourself and later question yourself "What if I had done this or that"? and what if something bad will happen etc.
The choice is yours since doing rituals may not be so important in reality but what is more important is your thoughts and understand why rituals are done and use this meaning in your life. This is more important and use the Sanskar.
If you start to believe in this learning process then all you need to do is Just take care of yourself and have faith in it.