four vidyadhara levels
{rig 'dzin rnam bzhi} 1) {rnam par smin pa'i rig 'dzin}. 2) {tshe la dbang ba'i rig 'dzin} 3) {phyag rgya chen po'i rig 'dzin} 4) {lhun gyi grub pa'i rig 'dzin}; four vidyadhara levels. four kinds of holders of intrinsic awareness