I've missed more than 9000 shots in my career. I've lost almost 300 games. 26 times, I've been trusted to take the game winning shot and missed. I've failed over and over and over again in my life. And that is why I succeed.
In public speaking, we must appeal either to the prejudices of others, or to the love of truth and justice. If we think merely of displaying our own ability, we shall ruin every cause we undertake.