As the sun, the eye of the whole world, is not tainted by the outward faults seen by the eye, so the one inner Self of all beings is not tainted by the world's sorrow, being outside it.
सूर्यो यथा सर्वलोकस्य चक्षुः न लिप्यते चाक्षुषैर्बाह्यदोषैः । एकस्तथा सर्वभूतान्तरात्मा न लिप्यते लोकदुःखेन बाह्यः ॥ ११॥
The sages, united with pure reason, renounce the results of their actions and, liberated from the cycle of birth, they attain a state of bliss.
So long as this soul does not know its real destination while dwelling in the body, it is not going to be liberated from the cycle of births and deaths. There is only one way to get rid of this wandering and that is to realise God while the human body is still there.