The greatest omission in life is to risk nothing

“The greatest omission in life is to risk nothing. The person who risks nothing gets nothing, has nothing, is nothing. He may avoid suffering, pain and sorrow, but he does not learn, grow, live, or love. He is only a slave – chained by safety – locked away by fear. Only a person who is willing to risk, not knowing the results, is alive.”
Anonymous

I came across that quote for the first time this morning on the web. Does anyone know who first said it?