I can't count myself with Rockefeller or Carnegie but I have had similar experience on a smaller scale. I haven't amassed astronomical fortunes but I have amassed smaller fortunes and sacrificed them for passion. In essence I have become, or maybe still becoming, what Rudyard Kipling wrote in IF. I can amass a fortune now and bet it on all on the roll of the dice and never think twice about my loss. I can lose everything and stoop down and rebuild with broken tools. I have been in the trenches and near the top.
Have I achieved all I want? No. Will I? Who knows. I take each day on faith with my goals in mind. I realize I can take risk and I am not afraid of them. I can face monsters but still fear and not want to face something much smaller at times. Still my will says otherwise.
You know you may not always understand the details but you will get the big picture. The details seem so complex but the universal code is simple and unwavering.