The first of the four aims, Dharma, loosely translated as Duty, refers to the inner guidance of a person to express himself in the noblest way, and to fulfill his highest purpose.
Artha, or Wealth is commonly devalued in other religions, however in a Hindu society, Wealth is considered a form of divine energy necessary for the society to function well.
Kama (Desire) was understood as the energy of creation necessary for the planet to not only survive but thrive. Many religions advocate against it, but the ancient rishis were wise enough to acknowledge that desire (in line with one's Dharma) has a place in society.
Loosely meaning Liberation, Moksha is the final goal of a self-realized individual. Once man experiences Wealth and Desire, and performs his Duty to the society, he is then free to detach from the material world, and pursue Moksha, or liberation from human bondage.