Lord Buddha preached: "We will have to find out the cause of sorrow and the way to escape from it. The desire for sensual enjoyment and clinging to earthly life is the cause of sorrow. If we can eradicate desire, all sorrows and pains will come to an end. We will enjoy Nirvana or eternal peace. Those who follow the Noble Eightfold Path strictly, viz., right opinion, right resolve, right speech, right conduct, right employment, right exertion, right thought and right self-concentration will be free from sorrow. This indeed, O mendicants, is that middle course which the Tathagata has thoroughly comprehended, which produces insight, which produces knowledge, which leads to calmness or serenity, to supernatural knowledge, to perfect Buddhahood, to Nirvana.
"This again, indeed, O mendicants, is the noble truth of suffering. Birth is painful, old age is painful, sickness is painful, association with unloved objects is painful, separation from loved objects is painful, the desire which one does not obtain, this is too painful - in short, the five elements of attachment to existence are painful. The five elements of attachment to earthly existence are form, sensation, perception, components and consciousness.
"This again, indeed, O mendicants, is the truth of the cause of suffering. It is that thirst which leads to renewed existence, connected with joy and passion, finding joy here and there, namely, thirst for sensual pleasure, and the instinctive thirst for existence. This again, indeed, O mendicants, is the noble truth of cessation of suffering, which is the cessation and total absence of desire for that very thirst, its abandonment, surrender, release from it and non-attachment to it. This again, indeed, O mendicants, is the noble truth of the course which leads to the cessation of suffering. This is verily the Noble Eightfold Path, viz., right opinion, etc."