It is ineffective to tell the person that it is wrong and against God's will to commit suicide, or to remind him of obligations to family and society. The suicidal person carries a heavy load of guilt and moral arguments only add to this burden. Do not be aggressive. Suicidal people sometimes make us feel hopeless and impotent, to which we often respond by becoming belligerently helpful. We urge the potential suicide to live in order to justify ourselves.
Emotional exhortations based upon our own needs are futile.
Do not try too hard to reassure the person. You may be tempted to rescue the potential suicide by telling her that she is a good person and that life is worthwhile. Your efforts will not succeed in making the individual feel rejected, misunderstood, and dismissed. The suicidal person does not like herself nor does she feel life is meaningful. Telling her that she is a good person and that there is hope is worse than useless.