Misc: What animal does the adjective 'cervine' refer to?

Questions

"Distrust any enterprise that requires new clothes."?

"Do not follow where the path may lead. Go instead where there is no path and leave a trail."?

"Do not squander time, for that is the stuff life is made of."?

"A bikini is like a barbed-wire fence. It protects the property without obstructing the view."?

"A billion here, a billion there - pretty soon it adds up to real money."?