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If being were not homogeneous, it would differ from itself and thus entail non-being, leading to contradictions. Hence, being must be homogeneous to avoid the inclusion of non-being.

Being must be complete and lack nothing; if it lacked something, it would imply the presence of non-being. Since non-being is not, being must be fully complete.

According to Parmenides, since being cannot come from nothing, it also cannot be destroyed and turned into nothing. Thus, being is permanent and indestructible.

Parmenides argues that being cannot move because there is no 'non-being' for it to move into. Since being fills all, movement is an illusion and being is therefore immovable.

Parmenides argues that if something exists, it could not have come into existence from nothing, because nothing comes from nothing. Therefore, being must be eternal and ungenerated.

Parmenides holds that the senses report the illusion of change, multiplicity, and movement, which all imply non-being. Since non-being is not possible, sensory experiences must be misleading, and only logical reasoning can reveal the truth of the one unchanging being.

Parmenides posits that change implies that something is moving from non-being into being, or vice versa, which is impossible. Therefore, being must be unchangeable.