Resist the temptation to travel over the older and easier path that you have been using in the past. Every time you resist the temptation the stronger do you become and easier will it be for you to do so the next time. But every time you yield to the temptation the easier does it become to yield again and the more difficult does it become to resist the next time. You will have a fight at the start and this is the critical time. Prove your determination, persistency and willpower now, right here at the start.
-Napoleon Hill from Think and Grow Rich