Stepping Stone -vs- Stumbling Block

"The difference between a stepping stone and a stumbling block is how we use it." -by dunno who (btw, do you know who?)-

My brother wrote it on the whiteboard at home months ago - and it's still there. As I see it too often (no choice, 'coz the board is strategically placed at home), it's been drilled into my conciousness (& subconciousness!). :p

Meaningful quote, tho'. Thanks Mr. Boy. :)