If our mind is being contaminated or influenced by so many impurities such like anger, hatred, jealousy, greed, dissatisfaction, pride, arrogance, disappointment, fear, worry, craving and aversion, and etc, then whatever we perceive in the mind through the senses of what we see, hear, smell, taste, touch and think, is not necessarily the truth of things or it is not what we think it is... Instead we will project our own imaginations onto things base on what our mind wants to believe or think what it should be, but it's not really what it is...
It is like when one person wears a red tinted glasses will see or perceive something blue as purple colour, and another person wears a yellow tinted glasses will see or perceive something red as orange colour, but it is not the truth of what it really is...
When our mind is being influenced by one or many impurities, then whatever we perceive through the eyes, ears, nose, tongue, body and mind of what we see, hear, smell, taste, touch and think will be contaminated by these impurities. It is not necessarily what we think or believe what it is...
And so, if our mind is not free from impurities, then how can we judge and criticize anyone or anything with this contaminated impure mind?
And when a mind is pure, is being free from impurities, then this pure mind will perceive the truth of everyone and everything as it is, without any judgments or criticisms... With a pure mind, there is no perception of qualities of good and bad, but everything is just being what it is... All dualities or qualities of names and forms disappear. And hence, what is left is just what things really are. They are not something good or bad. They are not something positive or negative. They are not something happiness or suffering.
When the mind is pure, there is no more craving towards something that was being perceived as "good, positive and happiness" through "the impure mind". There is no more aversion towards something that was being perceived as "bad, negative and suffering" through "the impure mind". And hence, there is no restlessness or unhappiness or fear and worry that arise due to craving and aversion is not being gratified, as there is no craving or aversion...
This is true freedom. This is what all the yoga practice is about. It is for us to purify the mind to eliminate impurities, so that the mind is able to perceive the truth of things as it is, and be free from craving and aversion which derive from ignorance and attachment towards the qualities of things that come from projection of the impure mind onto the names and forms that it perceives, which is the cause of restlessness and unhappiness.
Just by being good doesn't guarantee us peace and happiness if the mind is not free from impurities. We can be doing a lot of good actions and try not to do any bad actions, but still we are not really peaceful or happy because we are still being affected or disturbed by anger, hatred, jealousy, greed, dissatisfaction, disappointment, agitation, depression, pride, arrogance, craving and aversion, fear and worry, if we are identified with the impure mind or the ego, and thinking that "I" am experiencing all these reactions of the mind towards whatever it perceives through the senses, as the mind attached to the qualities of these names and forms, and generates craving and aversion towards qualities that it likes and doesn't like... It is only when the mind is free from all these impurities, craving and aversion, naturally peace and happiness is there...
Om shanti.
Be happy.