As in Mimamsa individuals are responsible for their own actions and thus determine their own happiness or suffering. The soul is affected by pleasure and pain, but the highest Lord is not.
Injunctions and prohibitions exist because of the connection of the soul with the body. Ethical action helps the soul attain a body fit for knowledge of Brahman, which then may be attained through service, renunciation, and meditation.
Meditation on the highest yields unity with the infinite and knowledge of Spirit (Brahman), enabling one to stop producing karma and end the cycle of karma and reincarnation.