'Spheres' of spiritual ascent as mentioned by Akali Guru Nanak Dev, in his composition 'Japji Sahib' (Adi Guru Durbar, pg. 1 to 8):
1) Dharam Khand (Sphere of righteousness)
2) Gian Khand (Sphere of knowledge)
3) Saram Khand (Sphere of hard work)
4) Karam Khand (Sphere of divine grace and action)
5) Sach Khand (Sphere of eternal truth)