Means of knowledge are sensory perception, inference and holy scriptures.
All living beings are different from Him and from each other and are subordinate to Him, all their actions are controlled by Him.
God Vishnu has complete power over souls and matter and that Vishnu saves souls entirely by his grace which is granted to those who live pure and moral lives. Evil souls are predestined to eternal damnation and should of mediocre quality will transmigrate eternally.