The only use of an obstacle is to be overcome. All that an obstacle does with brave men is, not to frighten them, but to challenge them.
Give me six hours to chop down a tree and I will spend the first four sharpening the axe.
There are risks and costs to action. But they are far less than the long range risks of comfortable inaction.
Nothing can stop the man with the right mental attitude from achieving his goal; nothing on earth can help the man with the wrong mental attitude.
What lies behind you and what lies in front of you, pales in comparison to what lies inside of you.