Doing all things through Christ what it does and does not mean

Can I really "do all things through Christ?" Besides being a strong Christian, I'm young, full of energy, and enthusiastic about life. As a result, I have big plans and want to do great things for God. When I talk like this, my family and friends tell me I've got stars in my eyes. When I quote Philippians 4:13 – "I can do all things through Christ who strengthens me" – they just laugh and brush me off. I know I'm right, but haven't yet figured out a way to convince them. Can you help me?