I can do all things through Christ who gives me strength.
Paul is writing from imprisonment, thanking the Philippian church for a gift they sent to support him. Just before this line, he says he has learned to be content in plenty and in hunger alike. "All things" means those extremes, not every goal a person might chase. The strength he names carried him through both.
Philippians, chapter 4. A thank-you letter from Paul to the church in Philippi.