A Directive to Physician is the Texas document that is commonly referred to as a Living Will. Living Wills are valid in Texas. This document instructs physicians to withhold or administer artificial life-sustaining procedures in the event of a terminal condition. Many people wonder why they should get a living will (Directive to Physicians). It is critical to have a Living Will because it allows you to make your wishes clear to your family and loved ones and eases their pain in having to make those decisions for you.