How do we overcome the illusion of separation in the material realm?

"If we have no peace, it is because we have forgotten that we belong to each other." --Mother Teresa

I asked a question in Yahoo Answers recently: Since we are living in a material dimension which causes us to have an illusion of separation and false identity, how do we walk by faith and not by sight in this world?
 
We all need spiritual eyes to see beyond the illusion and realise we are all one and not separate from one another. Though each of us is unique and different, we are all one in divine love and are interconnected and interdependent. I like the quote by Mother Teresa too - to realise our connectedness is to have peace in this world as we would seek to love others as ourselves, and love ourselves as others.

every one wants to love

Someone wrote:

"The need to right and win an argument is a STRONG indication of deep rooted insecurities that come from low self-worth. The ONLY cure for low self-worth is realizing you’re worth what God paid for you. Settle the self-worth issue and you’ll settle most of the arguments in your life".

That's true - everyone wants to love and be loved, and the way for a person to be established in his own self-worth is to realise the value God has placed on him. Jesus reminded us we are worth more than many sparrows, and he gave his life for us that we may be free from the illusion of separation and false identity and come to know our true identity and our oneness with God. We were bought with a price, as Paul described in 1 Corinthians, not in terms of paying penalty for so-called sins, but in terms of purchasing our freedom from ignorance and religion with God's own life to demonstrate we are worth everything to God. As Jesus has said, no greater love is there than this: that a man gives his life for his friends.

So yes, when a person is established in God's love and his own self-worth, he will know that he has nothing to prove and has no need to win a debate or argument. Instead, he will rest in his own belovedness, and do or say things for edifying others, that they may also benefit by knowing their true identity and their oneness with God and others.