The important qualities any disciple of Jesus needs (now or in the past) are:
available: A disciple must be available, able to be used.
teachable: God is always teaching His disciples. About Himself and themselves.
faithful: A good disciple must be faithful to do as taught.
They needed to learn faith, trust, and believe.
Koalas are not needed but, very important to the fox.
its important because they are needed
Thomas, who was not there when Jesus appeared to all His disciples. He said that He wouldn't believe Jesus was back unless he touched His wounds.
Jesus knew His time on earth would be brief. He needed the twelve men He picked as disciples to carry on the good news after His resurrection and ascention. The twelve were given the gift of the Holy Spririt through which they preformed miracles just as Jesus did.
it was important because they needed to know how to count
Strictly speaking, he did not. He could have done the whole thing without any help at all. It was the other characters who needed Aslan, and becoming his disciples was to their benefit. So he included them in his work and gave them tasks to do.
Beautiful. Important. Perfect. Needed.
It is just important to recover deleted files that are needed.
cellulose important in the diet as a source of needed fiber
Aqueducts are important because they bring water to where it is needed for consumption.
it was important because they needed to find queen isabella