Lord Krishna clearly give us the message for the complete liberation:

One who neither hates nor desires the fruits of his activities is known to be always renounced. Such a person, free from all dualities, easily overcome material bondage and is completely liberated, O mighty armed Arjuna.

– Bhagavad Gita 5.3

There has never been a time when you and I have not existed, nor would there be a time when we will cease to exist. As the same person inhabits the body through childhoold, youth and old age, so, too, at the time of death he attains another body. The wise are not deluded by these changes.

– Bhagavad Gita 2.12-13

One gradually attains tranquility of mind by keeping the mind fully absorbed in the Self by means of a well-trained intellect, and thinking of nothing else.

– Bhagavad Gita 6.25

Neither in this world nor elsewhere is there any happiness in store for him who always doubts.

– Bhagavad Gita

That Which really is, cannot go out of existence, just as the which is non-existent cannot come into being. The end of this opposition of ‘is’ and ‘is not’ has been perceived by seers of essential truths.

– Bhagavad Gita 2.16