As with any knowledge, doubts arise and need to be cleared routinely. Similarly, it is not uncommon for the seeker of liberation to have doubts about the teachings of Advaita or non-duality. In fact, there can be a feeling of despondency when doubts overwhelm the mind of the seeker. There is even the doubt if pursuit of Self-Knowledge is worth the effort. Especially, when statements like " It does not matter if one is knowledgeable or ignorant. Both are the same and equal" are heard or read, it makes the doubts even stronger. Why struggle for Knowledge if eventually it is all the same. At the same time, one realizes the lingering feeling of discontent and lack of peace and even if the idea of further pursuit of liberation through Knowledge is temporarily given up, one continues to seek contentment. Feeling of bondage results in discontentment. As long as there is lack of contentment, one cannot claim to be free or liberated. It is at such times that power of discrimination helps. The power of discrimination helps achieve Knowledge. Discrimination between the true and the false. Discrimination between the self and non-self. Discrimination between the gross and the subtle. Discrimination between the transient and the permanent. Discrimination between the changing and the unchanging.
Realize that work does not get done without effort. Hunger does not get satisfied without food. Liberation does not come about without Knowledge. In the same vein, if I eat, only my hunger gets satisfied and not everyone's hunger. Only if I swim, will I not drown in water. If someone else is swimming in the same body of water, it will not prevent me from drowning. In the same way, if I want liberation, I must be the one to get Self-Knowledge. It is the individual, who imagining himself to be in bondage, has to put in the effort through the power of discrimination to attain Self-Knowledge. One who has attained Self-Knowledge may then exclaim that all of humanity is already liberated. But, the fact remains that for those who feel they are in bondage, this statement does not help. Only when they who are not content, use the power of discrimination to achieve Self-Knowledge, will contentment become possible. Liberation is available to anyone and everyone who uses the power of discrimination to attain Knowledge of the Self. Just like only light can dispel darkness, only knowledge can dispel ignorance.
One who knows nothing is said to be ignorant (ajnani). One who knows everything is said to be Knowledgeable (jnani). One who has given up all knowledge after attaining it, becomes one with the Supreme (vigjnani).