The word viraktimat in this verse means "possessed of the qualification of renunciation." Spiritual realization cannot be attained by materialistic persons. For those who are addicted to sense enjoyment, spiritual realization is not possible. In Bhagavad-gītā it is stated that those who are too attached to seeking material possessions and material enjoyment cannot reach yoga-samādhi, absorption in Kṛṣṇa consciousness. Propaganda that one can enjoy this life materially and at the same time spiritually advance is simply bogus. Theprinciples of renunciation are four: (1) to avoid illicit sex life, (2) to avoid meat-eating, (3) to avoid intoxication and (4) to avoid gambling. These four principles are called tapasya, or austerity. To absorb the mind in the Supreme in Kṛṣṇa consciousness is the process of spiritual realization.
(Srimad Bhagavatam------3:20:53-----purport).

As the Lord says in the Bhagavad-gītā (9.28):
śubhāṣubha-phalair evaṁ
mokṣyase karma-bandhanaiḥ
sannyāsa-yoga-yuktātmā
vimukto mām upaiṣyasi
"In this way you will be freed from bondage to work and its auspicious and inauspicious results.With your mind fixed on Me in this principle of renunciation, you will be liberated and come to Me."
Real perfection in yoga comes when we forget our personal demands and determine what service the Lord wants from us. Personal interest must be sacrificed, along with our conceptions of good and bad, right and wrong, necessary and unnecessary, ans so on. We must emulate that great warrior Arjuna and try to find out what service the Supreme Lord wants from us. Such Kṛṣṇa conscious activities alone will lead us to the full consummation of all our duties, and the results will be all-auspicious. This degree of fixed faith is indispensable to progress.

(renunciation through Wisdom).