What does the Catholic Church teach about assisted suicide?
The direct killing of a human being, even if he is terminally ill, is always against the Fifth Commandment (Ex 20:13): You shall not kill. That applies to my own life, too. Only God is the master of life and death. On the other hand, to support a dying person and supply him with all possible medical and human care so as to alleviate his sufferings is to practise love of neighbour and perform a work of mercy.