1 Gita Sloka Every Day - Chapter 18 - Moksha Sanyasa Yoga - Sloka 50

The entire content of this mail is from Shri V N Gopala Desikan's  Srimad Bhagavad Gita, published by Vishishtadvaita Research Centre, Chennai and The Bhagavad Gita by Swami Chidbhavananda published by Ramakrishna Mission

The ways and means of liberation are now expounded

Karma Yoga is karma Sanyasa 49-57

1 Gita Sloka  Every Day - Chapter 18 - Moksha Sanyasa Yoga - Sloka 50

Siddhim praptoh yatha brahma tatha apnoti nibodh me I

Sam asena eva kaunteya  nishta gyanasya  ya para II sloka 50

सिद्धिं प्रप्तोः यथा ब्रह्म तथा आप्नोति निबोध् मे I 
सं असेन एव कौन्तेय निष्ट ज्ञानस्य य पर II श्लोक 50

Learn from me in brief, O Kaunteya, how reaching such perfection, he attains Brahman, That supreme consummation of knowledge.

Siddhi or perfection is the state to attain which everything in nature is incessantly struggling. The very plan and purpose of nature tend towards this end.The sentient and insentient are all shaping themselves only for perfection. Carbon that remains buried under earth for ages turns into diamond, a most precious gem. That this great possibility is potent  in a piece of charcoal cannot ordinarily be thought of. Time and environment are factors that contribute themselves for this great miracle  to take place. Man delights in helping himself to a luscious apple. The perfection that this fruit has undergone is the cause of the delight of man. But he does not ponder over the process that the apple plant has undergone to bring about this perfection. Sun, rain, dew, fog, water, frost, soil, manure, air - all these have contributed their quota to the apple and have aided its progress towards perfection. All lives are struggling in their own way to reach perfection in their respective spheres.

But of all the attempts of all beings for perfection, the one that a man enjoys is of special merit. The siddhi of the other things and beings are confined to the material plane. Therefore it is prone to nullification. A diamond for example may again be reduced to a bit of carbon.Honey, nectar and ambrosia tur again into dirt. But the siddhi that is open to man leads him to immortality, to immutation and to moksham. And this perfection of manis not of the body but of the mind. The mind of one man is not like another. There are as many moulds of mind as there are human beings. In the course of countless rebirths these minds are undergoing modifications influenced by internal promptings and external situations.

It is the practise of yoga that chisels the mind of all of its angularities and shapes it into perfection. He is a siddha whose mind is cured of all of its defects. A pure mind is fit for brahma jnana. That yogi who gains in Brahma jnana attains moksham. There is no perfection greater than this.