Don't listen to people when they tell you it is so difficult to achieve, rather tell yourself you can do it and you are up to the challenge. Believe in yourself and just think that if you want to do it, you can do it but you need to work a little bit harder. That's the key to achieve anything in life. A little faith and hard work, will surely pay off. Look at the challenge with a challenging eye, and do all you can to overcome it. Don't waste time thinking how am I able to go through it or feel discouraged. Dig in yourself for positive energy and take it one step a time, you will be surprised of the results.