If you want to arrive, you have to know your destination.
Know where you are going. Is it the mountain top? Remove your mind from how far away it is. Think of the thrills of your journey and enjoy every step you take.
If it is challenging, enjoy facing each challenge.
You will be surprised that before you know it, you have arrived.
But, if you keep looking at the mountain top, fearing and wondering how you will ever get there, you might be discouraged; and that might push you to give up.