"I can do all things through Christ who gives me strength."

For Paul to say the things he has said: that life is all about Christ, that our focus should not be on satisfying our own desires but on giving ourselves for the sake of others; that every pursuit is nothing but garbage in comparison to knowing Christ…and then suddenly for him to close the letter by saying that Christ will give you the power to achieve anything you want to achieve?

It makes no sense. And it makes no sense because that is NOT what Paul is doing.

What he is doing is promising us that Christ will give us everything we need in order to stand firm in Him, in order to live our lives with this way of thinking, in order to see life through the lens of knowing Jesus, loving like Jesus, and living for Jesus.