because a will is in force only when somebody has died; it never takes effect while the one who made it is living.
NMVFor a testament (a covenant, ratified in death) [is] of force after men are dead: otherwise it is of no strength at all while the testator lives.
OJBFor a Brit, a tzavv'a (covenant, will) is valid only when Bnei Adam have died, for it is never validly executed as long as the ba'al tzavva'a (testator, person who makes the will) lives.
RVFor a testament is of force where there hath been death: for doth it ever avail while he that made it liveth?
TCENTbecause a will takes effect only after the person's death; it is never in force while the person who made it is alive.
T4TA will goes into effect only when the one who makes the will has died. It is not in effect when the one who made it is still alive.