If obstacles are large, jump higher.
You have to create your self-belief by going to your core to find the probable reasons for the negativity in you, and then demolish them.
Success is simply never giving in to failure - either in mind or body.
If you have positive energy you will always attract positive outcomes.
If you want to continue to be the best in the world, then you have to train and compete like you are second best in the world.
Invest your energy in the things you can control.