Absolutely necessary, essential, or requisite
The eye cannot say to the hand, “I have no need of you,” nor again the head to the feet, “I have no need of you.” On the contrary, the parts of the body that seem to be weaker are indispensable, and on those parts of the body that we think less honorable we bestow the greater honor, and our unpresentable parts are treated with greater modesty, which our more presentable parts do not require. But God has so composed the body, giving greater honor to the part that lacked it, that there may be no division in the body, but that the members may have the same care for one another. If one member suffers, all suffer together; if one member is honored, all rejoice together.
We need people with disabilities/special needs, in our lives and in our churches. They are helping us do battle with the enemy. How does your child (or sibling, parent, friend, neighbor) with special needs silence the enemy?