"The shortest path of knowing who you are is knowing who you`re not"
The world is full of uncertainties and the fact is that one can never change the condition of this universe. However, we can make arrangements to change ourselves in order to adjust with the environment and learn to live harmoniously. We must as far as possible create an environment which is conducive to peace, prosperity and happiness among the people. Therefore, great Saints the world over have propagated the need for self-realization among the people. We often say that the ocean is blue in colour but if you were told to go out there and bring a bucket of blue water that would be impossible because the water is actually clear even though it appears to be blue.

ELUCIDIATION
This is a topic that a lot of ancient stoics, gurus, psychologists, religious leaders, and spiritual groups have greatly treated.
Self Realization
When we say self-realization, we are talking about been open to the world around and within us as a few of us may have realized that this two worlds exist and yet not a lot of people can perceive this and in order to exist in this worlds around us.

we have to shed our skin and by shedding our skin I mean letting go and just going with the flow, cause it is said that "only when we let go of trying can we achieve" and the same thing happens when we let go of our ego, fears, guilts, insecurities, materialistic needs, society norms and only then can we begin to walk in the path of self-realization.
Romans 12:2
And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is good, and acceptable, and perfect, will of God. Click here