You only fail when you stop trying.
How often do we hear, "You can't do that," or "That won't work," or "It's not possible,"? When we hear these negative phrases, our only response should be, "Why not?"
Life is never as black or white as it seems. There are always shades of gray. Sometimes, we need to throw a little color into the scenario. When situations seem impossible, find a way to make them possible. Succeeding often involves doing something different or going against the grain. But, we won't know what's possible if we don't try.
Don't let anyone or anything hold you back from making your dreams come true, including yourself. If you have the will, you can find a way. And you might fail. You might fall. You might feel defeated. When those moments of despair hit, pick yourself up, brush yourself off, and try again. Thomas Edison once said, "I didn't fail 1,000 times. I just found 999 ways how NOT to make a lightbulb."
If you put forth the effort and look for those windows of opportunity, you'll be amazed at what you can accomplish. The secret is to never give up. The minute you give up, you've failed.