CORNERSTONE: definition (noun) the chief foundation on which something is constructed or developed

Come with forceful wills
Over the hills and desert bleak
Reach for inner greatness
Not returning, but a smiling cheek
Every trick has its trade
Remember that, and it's usefulness
Stones break over a sharpened edged blade
Towers will fall wayside by forceful winds made
Only desire keeps the flame burning
Is now a time to overcome?
Everything you find yourself yearning?
It is upon Cornerstones... we are made