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Rock Plaza Central – how shall i to heaven aspire? Lyrics 14 years ago
I've always heard the line as "steeled by years of my indecision," which I think makes more sense in context.

As in:

"tr.v. steeled, steel·ing, steels
1. To cover, plate, edge, or point with steel.
*2. To make hard, strong, or obdurate; strengthen: He steeled himself for disappointment."*
http://www.thefreedictionary.com/steel

* This information can be up to 15 minutes delayed.