Shrimad Bhagavad Gita As It Is -Shri Shrimad A.C Bhaktivedanta Swami Prabhupada
Chapter 4: Verse-29
The intelligent yogi is interested in attaining perfection in one life, without waiting for the next. For by practicing kumbhaka-yoga. the yogis increase the duration of life by many, many years. A krsna conscious person, however, being always situated in the transcendental loving service of the Lord,automatically becomes the controller of the senses. His senses, being always engaged in the service of Krsna, have no chance of becoming otherwise engaged. So at the end of life, he is naturally transferred to the transcendental plane of Lord Krsna; consequently he makes no attempt to increase his longevity. He is at once raised to the platform of liberation, as stated in Bhagavad-gita 
mäm ca yo ’vyabhicärena
“One who engages in unalloyed devotional service to the Lord transcends the modes of material nature and is immediately elevated to the spiritual platform.” A krsna conscious person begins from the transcendental stage, and he is constantly in that consciousness. Therefore, there is no falling down, and ultimately he enters into the abode of the Lord without delay. The practice of reduced eating is automatically done when one eats only krsna-prasädam, or food which is offered first to the Lord. Reducing the eating process is very helpful in the matter of sense control. And without sense control there is no possibility of getting out of the material entanglement.