The Sadhaka must adhere to Sattva ideal - serenity, purity and equanimity. His inborn nature and social nurture might help him in this, but he must consciously and steadily cultivate this perseverance to attain purity of thought, word and deed. It is wrong to attribute the ups and downs in one’s life to the will of God; they are due to the cultivation or neglect of this quality of perseverance.
Expansive Love, purity of intention and an eagerness to sacrifice-these three are the criteria for the Sattvika quality. They are the chief limbs of the spiritual body, which require attention. Mental health and spiritual well being depend on these limbs. (SSS Vol.17, pp. 28-29)