Not quite there yet but am trying to assume this line of thinking:
“I love my rejection slips. They show me I try.” – Sylvia Plath
On that same note I find it soothing to read negative reviews of books I've loved. I find solace in how different opinions can be on the same work. Keep trying.
Ps. To clarify: I know Plath can hardly be summed up as a person radiating positive thinking. I mean only that that one sentence characterizes positive thinking taken to the extreme.