As a person who has experienced suicidal feelings let me assure you that no person who has not themselves felt suicidal can relate to the suicidal mind-set. The question of whether or not it is a sin is irrelevant. The pain whatever it is becomes unbearable. If you are ever in the company of a person who is intending to suicide, the very worst thing you can do is to deny the reality of that person's feelings. He/she (bloody stupid feminists mucking up our language ) wants acceptance not rejection. If you say for example: "You shouldn't feel like that," or "There is no need to feel like that" this could well push the person over the brink. But don't take my word for it. Ask anyone who has been trained to work as a crisis counsellor. You DO NOT deny the validity of the person's feelings. They are real and terrifying. You want to commit murder? Then go tell a suicidal person that he/she doesn't need to feel like that. You might just push them over the edge which will make YOU guilty of their death.