In a previous post, it was discussed about always trying despite fear of failing. But this shouldn't be taken to always try in all matters before you are ready. Just because you're unable to even try and run that whole mile doesn't mean that you have failed. You just now have a goal to inspire to. Don't look at what you can't do and look at what you're going to accomplish.
"I'm not ready to ask him out," "I couldn't even do one push up," "A university might not be for me yet,"--none of this means you will never be able to or you are a failure. You're not a coward for not being ready to make a romantic move. You're not a loser because you can't accomplish something new instantly. And just because a challenge is in your face that looks too intimidating doesn't mean you can never face it.
So many things in life take time to get use to. Baby steps can be a necessity for success. No one should be so disappointed with themselves because they tried but couldn't. And just because you "can't" doesn't mean that you "can't" forever. Either keep trying or move on to something else till you are ready to try again.
And all of this can be the same for writing. Your first edition doesn't meet your expectations? You got rejected? Been about a month since you last wrote on your project? Don't let it hurt you! Just keep trying and don't let the "can't" keep you stuck at where you are.
If it is worth it to you, all your attempts won't fail you. Like in the last post, the failures are steps to mature and learn. You become stronger and better by learning from what you couldn't do a year ago. Don't let it hurt you, let it harden you and try even harder for the next time.
Need some more inspiration? Take a minute to check out these famous failures and realize that you can always amount to anything no matter what happens.