We can perceive "Heaven" in two ways. As a destination of peace, harmony and love available to us when we leave this earthly plane.
We can also perceive heaven as a state of existence on this earthly plane that is characterized as one of peace harmony and love. Heaven is a state of mind, whether on earth or in the hereafter that comes about as a result of our thoughts. When we align our thoughts with the thinking of the great spiritual masters we automatically receive the benefits of a heavenly state.
The universal principle of cause and effect states the nature of any cause is found in its effect. If love is the cause of your thoughts, words and actions, love is going to be the effect. The same holds true for hate, resentment and conflict, which create an uncomfortable condition in our lives often referred to as hell. Each of us individually creates the emotional state of our existence.
We have the free-will to chose the thoughts, words and actions we express. By choosing to express peace, harmony and love we create situations in our lives that are of "heaven". You are responsible for the conditions of your life. So, the next time you are feeling greatly disturbed, hateful, in conflict or out of harmony ask yourself, "What IN hell, am I doing."