The world is full of suffering.
Birth is suffering, old age is suffering, sickness and death are sufferings.
A man full of hatred is suffering, to be separated from a beloved one is suffering, to be vainly struggling to satisfy one's needs is suffering. In fact, life that is not free from desire and passion is always involved with distress. The cause of human suffering is undoubtedly found in the thirst of the physical body and in the illusions of worldly passion. If these thirsts and illusions are traced to their source, they are found to be rooted in the intense desires of physical instincts. If desire, which lies at the root of all human passion, can be removed, then passion will die out and all human suffering will be ended.