Karm-yog
is the safer path to take for most people, as explained in verse 5.2, and that is why Shree Krishna has strongly recommended it to Arjun.  However, for someone who is truly detached from the world,
karm sanyās
is also suitable.  It is advantageous in that there is no diversion of time and energy toward worldly duties, and one can dedicate oneself fully to the practice of spirituality.  There have been many accomplished
sanyāsīs
in history.  Shree Krishna states that such true
karm sanyāsīs
also make rapid progress and experience peace everywhere.  By eliminating the urges of desire and anger and subduing their mind, they attain perfect peace both in this life and here-after.
We often harbor the misconception that external circumstances are at fault for the lack of peace in our lives, and we hope for the day when the situation will become conducive to peace of mind.  However, peace is not dependent upon the external situation; it is a product of purified senses, mind, and intellect.  The
sanyāsīs
, with their mind and thoughts turned inward, find the ocean of peace within, independent of external circumstances.  And then, with the internal machinery in order, they experience the same peace everywhere, and are liberated in this world itself.