The only way to learn mathematics is to do mathematics.
The Moving Finger writes; and, having writ, Moves on: nor all thy Piety nor Wit Shall lure it back to cancel half a Line, Nor all thy Tears wash out a Word of it.
Sustainability isn't just a goal; it's a responsibility we all share.
What we need to do is not to follow, but to lead.
In the desert, I found a freedom that the city could never offer.