Once achieved, you are free from Samsara. There is liberation from want and sorrow, union is found with the ultimate reality - true happiness is achieved. It must be made clear that not all Hindus choose to follow these goals; it is a person's own decision to find the truth. Some might follow some of the more difficult goals in later life, after they have started a family etc.
The Hindu response to the meaning of existence gives purpose and value to human life and shows people where they fit and how to act within it. Hindus can get a sense of where they fit into the world because they look far beyond the world around them. More than their human life, they see their eternal souls (atman) as something, in which life's aim is to lead it to something far greater than any false joy on earth, perfect happiness with God in the cosmos. With life having a purpose, they begin to value human life and begin to consider all their actions within it. Life is no longer a waste of time -- according to karma -- every action or thought a Hindu makes in life will determine how they will live in the next. Human life can be seen with value, for it is a greatest opportunity to cleanse the soul and clear past mistakes. The goals of life, Purusharthas, give people a clear direction and morals - what is the right way to act in life to achieve its purpose. If life is tough for a person who has achieved dharma, all he has to do is consider his future life, where he can see himself in a better life. In this notion, the cycle of deaths and births can give hope for the future, rather than it being void of meaning. .
Ethics:.
To Hindus, spiritual life is impossible without a moral and ethical life. We are all part of the divine therefore, according to the Bhagavad Gita 'Thou shalt love thy neighbour as thyself'-- because thy neighbour is thyself." Most Hindu's therefore believe that order in society if order everywhere.