The picture of you achieving your dreams keeps you going when things are not going so well, and, of course, it stretches your faith, keeping you going.
My dream is not just a dream if I can achieve it alone. I don't quite understand this sentence, or is it like this one: 'no man is an island,' which means you need people's help to get to wherever you're going in life.
You summarised it so well and you absolutely nailed it too. We will always need the help of people around to achieve our dreams. It's important to surround yourself with credible people who will make it bearable.