Whatever God does, he does well. Christ has started something, he will accomplish it. There is still work to be done. The end product is someone who perfectly reflects Jesus. Woes of world lead to pessimism.
Christians can be optimistic.
We believe in completion, an end. D. We can be confident - but not dogmatic. He who stands firm to the end will be saved. We need to help people be firm and challenged to grow. A. Paul knew he was part of a great thing.