The devotee can constantly think of the object of worship, the Supreme Lord, in any of His features — Narayana, Krsna, Rama, etc. — by chanting Hare Krsna. This practice will purify him, and at the end of his life, due to his constant chanting, he will be transferred to the kingdom of God.
Srila Prabhupada; Bg 8.8 purport