The relative view is that which we express:  It is the factual truths about life and the world. The concepts of rebirth, karma, and suffering are all relative truths.

The absolute view is the mind of the Buddha which cannot be defined by words, it is a direct experience. In the teachings, masters express the absolute view with logic or the negation of reality. But literally one can't really express the absolute view through words and writing. Buddhist masters use relative conventions of the world to give us a glimpse of what the absolute truth is.

It is necessary to understand that the Buddha taught both the relative and absolute reality, because otherwise His teachings might seem contradictory. 

For example, the relative view is expressed when one says: "A Bodhisattva should acquire wealth in order to aid sentient beings."  This is relative because factually this is the truth and necessary. But then from the absolute view,"A Bodhisattva should give up wishing to acquire wealth."  The absolute view of the Buddha's mind is free from attachment, whether or not the wealth is there.  Therefore, these views are not contradictory.

Also, in Buddhism a practitioner is urged to acquire “wisdom.” This is relative reality. But then the Buddha says “there is no wisdom, there is no teacher, there is no rebirth, etc.”   This again can sound completely confusing but it is merely another glimpse of the absolute truth.  One has to remember the absolute truth is beyond facts, figures, concepts and perceptions; it is non-dualism and beyond all extremes.

The relative view states what is worldly, what is factual and what is needed.  The absolute view expresses the mind of a Buddha or Bodhisattva.

As Milarepa, a great realized master, once said: "I've gained confidence that there is no arising. This swept away my taking past and future lives as two while exposing all six realms, appearances, as false and cut right through believing all too much in birth and death."

Again, this is a presentation of the realization of the absolute view which we won't understand unless we realize it;  it is not the denying the relative truth that rebirth exists.

Before one realizes the absolute view, we must gain firm ground in understand that there is the relative view....that is, the relative view which teaches virtue, rebirth, karma and the rest. As a practitioner, one begins with the relative view by thinking "this is right, this is wrong."  Then, you progress forward.

A practitioner should not begin by thinking, "Oh nothing exists!  Nothing is right or wrong!  Lets stop thinking!"