It has been said that the mind is the source of all our sorrow, but it is also the source of all by our joy. It is true that we say things to ourselves that we would never say to anyone else, we are often our biggest critic. It is also true that the way we think about a situation influences how we understand it and how we feel about it.
If you say to yourself “this always happens to me” or “why me?” you are essentially making yourself into a victim, and a victim has no control over their life, they are helpless. We have thoughts like this all the time, through habit and having heard them when we were growing up. Often we are not even aware of the effect of saying such things out loud or to ourselves.
Our self image is also largely influenced by what we say and think to ourselves. We really are what we think. In the words of William Shakespeare, “…there is nothing either good or bad, but thinking makes it so.”