When we accept the way things are, we are able to love everything and everybody. When we are not able to accept even one thing in this world right now, then how could we ever develop boundless love?
Lack of acceptance is conflict. Conflict is pain. It is psychological pain. It is a spiritual illness. As long as our hearts are tormented by that pain, we do not have the strength to give our heart to anything and because of that, it is impossible to bring about inner awakening.
Enlightenment, you see, is just another name for boundless love. It is almost impossible to practice loving-kindness towards all living beings without addressing, in a meaningful way, the innumerable problems arising in our own lives. It is a contradiction, you see. It does not work.
If our heart is tormented because we are not able to accept things the way they are, then it is impossible to open our heart. It is impossible to let go of all of our defenses and embrace others.
Therefore we have to constantly practice and deepen our awareness. We have to remind ourselves to accept things as they are.
This is pretty much what the teachings called Mind Training are all about. Mind Training is about carrying those perspectives and reciting phrases like “I shall accept the way things are.”