Robert Frost once said that sometimes he wrote great things and other times we wrote complete & utter dog doo. Why is this statement significant? Because you've got to allow yourself to write some dog doo before you can write the great stuff. :)
And this requires some poetic license: However, you've got to know the rules of grammar before you can break them. So, for example, if I've got a sentence starting with the word "because," it's not because I'm some ignorant sod. It's because I'm using poetic license. The other reason is because this is a blog, & thus, less formal writing is required.
So there. Haha.
If we get all tensed up & put pressure on ourselves to only write when it's easy, or when we know we're only going to spin gold, then ironically, the well springs of inspiration will often magically dry up and disappear. However, if we just let ourselves write, no matter what comes out, we have a better chance of hitting the "bullseye" -- i.e., moments of great writing.
If only we can let ourselves be free and just write. Don't think too much. Just write. Write from your gut. From instinct. Write about your imperfect, messy life. Because we aren't frozen in time. We move through it, ever changing.
Write about what is, about ideas, about what you & other are. Versus just sitting there, waiting for the words to pop out onto the page in some perfect form. The secret is to just let go.
Have faith in your abilities, & take a big flying leap into the Unknown.