One thing about giving up is that you get to forfeit everything you have done or all the energy you have put in till the point of giving up. Yes it may be too difficult to continue at certain points in life, but do always remember that it always gets toughest towards the end. It is usually darkest before dawn.
When ever you feel like giving up, just know that chances are that you have almost reached your goal and you need to cross one last but very tough huddle before you can grab it.
Remember all you have done, all you have put in, all you have had to endure, all life has made you swallow and tell yourself you have come this far to just come this far! Keep pushing no matter how hard and you will defeat and come out a Victor.