For we rejoice, when we are weak, and ye are strong: this we also pray for, even your perfecting.

In fact, we rejoice when we are weak but you are strong, and our prayer is for your perfection.

for we rejoice when we may be infirm, and ye may be powerful; and this also we pray for--your perfection!

For we rejoice when we may be weak and ye may be powerful. But this also we pray for, your perfecting.