And Jesus said unto him, Verily I say unto thee, To day shalt thou be with me in paradise.
καὶ εἶπεν αὐτῷ ὁ Ἰησοῦς, Ἀμήν λέγω σοι σήμερον μετ᾽ ἐμοῦ ἔσῃ ἐν τῷ παραδείσῳ.
-- Luke 23:43
σήμερον is obviously in emphatic position. The promise to the penitent thief is that there will be no lingering death, and the conviction of Jesus is firm belief in immediate immortality for both himself and this thief, not in future resurrection.
