I can do all things through Christ who strengthens me.
I can do everything through him who gives me strength. ( not once does it mention us doing it in our own strength.
" Everything "
Meaning that nothing is impossible for God. We can face all sorts of enemies and obstacles and difficulties, but only if we ask God for strength and not minute think we can or are doing it on our own.
The secret is drawing on Gods power for strength, learn to rely on Gods power to help you be content. We need to learn to be content with what we have. God will supply all your needs, but in a way that he knows is best for you.
Just like Moses, Samson, David, and all the other men in the Bible, they did it with Gods strength, and as soon as they tried it on their own, they failed miserably.