B Jhana is a meditative state of profound stillness and concentration in which the mind becomes fully immersed and absorbed in the chosen object of attention. It is the cornerstone in the development of Right Concentration.

First Jhana - Vithakka Vichara - effortlessly taking the object of meditation repeatedly

2 - Preethi - happiness (non sensual happiness)

3 - Sukha - lightness

4 -Upekkha, Ekaggatha - indiffference to any feeling or emotion