Natural life is when the power of love forces you to always do the right thing.
Marriage with a view to peaceful and virtuous life and with a view to procreate servants of the Lord is a good institution for a Vaisnava. Spiritual cultivation is the main object of life. Do everything that helps it and abstain from everything that thwarts the cultivation of the spirit.
In Vedic literature Krishna is the central point of attraction and His service is our activity. To attain the platform of love of Krishna is life's ultimate goal. Therefore Krishna, Krishna's service and love of Krishna are the three great riches of life.
Life's desires should never be directed towards sense gratification. One should desire only a healthy life, or self-preservation, since a human being is meant for inquiry about the Absolute Truth. Nothing else should be the goal of one's works.
What is the value of a prolonged life which is wasted, inexperienced by years in this world? Better a moment of full consciousness, because that gives one a start in searching after his supreme interest.
Human life is specifically meant for self-realization. It is the junction from where we can depart from the path of illusion and enter onto the free way of truth.