There are different types of great personalitiessome are positive great personalities, some comparative and some superlativebut King Prthu exceeded all of them. He is therefore described here as mahattamah, greater than the greatest. Maharaja Prthu was a ksatriya, and he discharged his ksatriya duties perfectly. Similarly, brahmanas, vaisyas and sudras can discharge their respective duties perfectly and thus at the ultimate end of life be promoted to the transcendental world, which is called param padam. Param padam, or the Vaikuntha planets, can be achieved only by devotional service. The impersonal Brahman region is also called param padam, but unless one is attached to the personality of Godhead one must again fall down to the material world from the impersonal param padam situation. It is said, therefore, aruhya krcchrena param padam tatah: [SB 10.2.32] the impersonalists endeavor very strenuously to achieve the param padam, or impersonal brahmajyoti, but unfortunately, being bereft of a relationship with the Supreme Personality of Godhead, they come down again to the material world. If one flies in outer space, he can go very high up, but unless he reaches a planet he must come down again to earth. Similarly, because the impersonalists who reach the param padam of the impersonal brahmajyoti do not enter into the Vaikuntha planets, they come down again to this material world and are given shelter in one of the material planets. Although they may attain Brahmaloka, or Satyaloka, all such planets are situated in the material world.