One of the greatest wishes of many people is to be mentioned in the will of a rich relative. How great it would be if Uncle Ralph dies and leaves us a million dollars in his will. Hallelujah! We're in the will! Of course, being in the will is no help if Uncle Ralph outlives us. The will has no effect if Uncle Ralph doesn't die (see Heb 9:17).
This is part of the context for today's Eucharistic readings. Oh, to be in the will of God! Then we could inherit life everlasting, eternal happiness, and even become "brother and sister and mother" to God (Mk 3:35). There's only one hitch: God has to die first.
God the Father prepared a body for God the Son (Heb 10:5). Out of love for us, Jesus took on human flesh and became the "Executor" of the estate, carrying out the will of God by dying. Now the will can take effect. Hallelujah! We're in the will!
However, there is a provision in the will. We ourselves must also die for God's will to take effect. We must die to our own will and do God's will. Just as the death of Jesus brings us into God's will, so our dying to self can help bring others into God's will. Imitate Jesus. Die to self so others can shout: "Hallelujah! We're in the will!"