Shrimad Bhagavad Gita As It Is -Shri Shrimad A.C Bhaktivedanta Swami Prabhupada
Chapter 3: Verse-4
na karmanäm anärambhän
Not by merely abstaining from work can one achieve freedom from reaction, nor by renunciation alone can one attain perfection.
The renounced order of life can be accepted when one has been purified by the discharge of the prescribed form of duties which are laid down just to purify the hearts of materialistic men. Without purification, one cannot attain success by abruptly adopting the fourth order of life (sannyäsa). According to the empirical philosophers, simply by adopting sannyäsa, or retiring from fruitive activities, one at once becomes as good as Näräyana. But Lord krsna does not approve this principle. Without purification of heart, sannyäsa is simply a disturbance to the social order. On the other hand, if someone takes to the transcendental service of the Lord, even without discharging his prescribed duties, whatever he may be able to advance in the cause is accepted by the Lord  Sv-alpam apy asya dharmasya träyate mahato bhayät. Even a slight performance of such a principle enables one to overcome great difficulties.