A Krsna conscious person is above duality because he does not hesitate to act in any way for the satisfaction of Krsna. Therefore he is steady both in success and in failure. These signs are visible when one is fully in transcendental knowledge.
One should follow in the footsteps of great acaryas who are in the disciplic succession and thereby attain success.
A Krsna conscious person has no desire for self-satisfaction. His criterion of success is the satisfaction of Krsna, and thus he is the perfect sannyasi, or perfect yogi. Lord Caitanya, the highest perfectional symbol of renunciation, prays in this way:
na dhanam na janam na sundarim
kavitam va jagad-isa kamaye
mama janmani janmanisvare
bhavatad bhaktir ahaituki tvayi
[Cc. Antya 20.29, Siksastaka 4]
"O Almighty Lord, I have no desire to accumulate wealth, nor to enjoy beautiful women. Nor do I want any number of followers. What I want only is the causeless mercy of Your devotional service in my life, birth after birth." Bg 6.1
The yoga practitioner should be determined and should patiently prosecute the practice without deviation. One should be sure of success at the end and pursue this course with great perseverance, not becoming discouraged if there is any delay in the attainment of success. Success is sure for the rigid practitioner.
Regarding bhakti-yoga, Rupa Gosvami says:
utsahan niscayad dhairyat
sanga-tyagat sato vrtteh
sadbhir bhaktih prasidhyati
"One can execute the process of bhakti-yoga successfully with full-hearted enthusiasm, perseverance, and determination, by following the prescribed duties in the association of devotees and by engaging completely in activities of goodness." (Upadesamrta 3) Bg 6.24
- From the Bhagavad-gita As It Is