'Able' in the Bible

Him then I am hoping to send as quickly as possible, when I am able to see how things will go for me:

By whom this poor body of ours will be changed into the image of the body of his glory, in the measure of the working by which he is able to put all things under himself.

But I am very glad in the Lord that your care for me has come to life again; though you did in fact take thought for me, but you were not able to give effect to it.

But I will not say anything about my needs, for I am able, wherever I am, to be dependent on myself.

I am able to do all things through him who gives me strength.