What is self realization all about, realizing our true inner self existing in our heart as soul atman! We normal human beings dominated by ego failed to realize our true identity as a soul atman. We can realize our identity as a spirit, soul atman existing in heart only by indulgence in spirituality as detailed in Bhagavad Gita. There is no other way of realizing our true inner self.
Realization of self means becoming a pure soul atman in the cosmic journey of life. Ever since a soul atman separated from its source it got mired in impurities. To cleanse self of dross impurities within starts cosmic life cycle of every soul atman. A soul atman manifests human form only to cleanse self of dross impurities within as of its own it cannot purify itself.
The human form, human life is but a medium for soul atman within to cleanse dross impurities within. As a human being we had no locus standi in the spiritual realm. This is also proved by doctrine of Maya (veil of illusion) propagated by Adi Shankaracharya. The doctrine of Maya says, other than God Almighty nothing exists in system.
If we view the entire cosmos from spirituality point of view, the whole cosmos is made up of clusters of atoms and molecules. Only when perceived from senses point of view things appeared solid, in reality all was gaseous formation. The human form itself is nothing else but clusters of atoms and molecules. Furthermore, as the present cosmos does not seem to have a boundary, it could not be infinite. It could only exist in thoughts of God Almighty similar as existence of an image in the mirror.
The whole doctrine of spirituality is primarily meant for human beings reaching state of self realization, realizing our true inner self as a soul atman, the spirit consciousness within.
Coming to God realization, human beings realized God when they became a pure soul atman. The whole purpose of indulgence in yoga meditation is, merging with God Almighty, Parmatman forever. This becomes possible when human beings indulging in spirituality as per Bhagavad Gita finally succeed reaching state of self realization, god realization.
When the soul atman merges with God Almighty forever, it is termed realization of God. God realization is also the ultimate goal of life of all human beings on mother earth. God realization is achieved indulging in spirituality, never religion.
Indulging in spirituality as detailed in Bhagavad Gita when human beings negate their karma to zero, they finally became a pure soul atman in the cosmic journey of life. This state of absolute purity as a soul atman is the state of God realization. Furthermore, if we look at definition of God Almighty things become clearer better.
If an individual grain of sand is an independent soul atman, the whole mound God Almighty. If an individual piece of puzzle is an independent soul atman, the completed puzzle God Almighty. Souls’ atmans in essence are not distinct from God Almighty. This also means that God Almighty existed in all human beings in miniscule form as soul atman residing in our heart.
Reaching inner confines of our heart, the soul atman also means reaching God Almighty.
Spiritually both self realization and God realization meant the same.