Though. So A C Vulgate, Hilary, Origen. But 'Aleph (') B Delta G f g omit it. Then translate, 'For He was even crucified,' etc.
Through weakness - Greek, 'from weakness;' i:e., His assumption of our weakness (susceptibility for suffering) was the necessary condition from which the possibility of His crucifixion flowed (Hebrews 2:14; Philippians 2:7-8).
By - Greek, 'from;' 'owing to.'
The power of God - the Father (Romans 1:4; Romans 6:4; Ephesians 1:20).
Weak in him - i:e., in virtue of apostolic union with Him, and after His pattern, weakness predominates in us for a time (exhibited in "infirmities" and weak "bodily presence" (2 Corinthians 10:10; 2 Corinthians 12:5; 2 Corinthians 12:9-10); also in our not putting into immediate exercise our power of punishing, as Christ for a time kept in abeyance His power).
We shall live with him - not only hereafter, free from present infirmities, in the resurrection (Philippians 3:21), but presently in the exercise of our apostolic authority against offenders, which flows to us, in respect to you, from the power of God. 'With Him' - i:e., even as He now exercises His power in His resurrection life, after His weakness for a time.