So what is Bhagwat Gita /
The purpose of Bhagwat Gita is to free man from the bondage of the material world.
Every person is entangled in many kinds of difficulties, just as Arjun was also in difficulty while fighting in Kurukshetra. Arjun took refuge in Shri Krishna and as a result this Bhagwat Gita was preached.
Not only Arjun Vrana,
Everyone of us is full of worries due to this material existence. Our Existence is in the same environment of Non-Existence . We should not Fear Existence.