Have I been sent mad by goats?

I am on a retreat in the Portuguese mountains outside Faro, a heavenly place called Moinhos Velhos. I have not eaten food in three days. I have practised hours of yoga and meditation. I have swum many cool, slow lengths of a blue-tiled pool and sweated in a wood-fired sauna and walked for miles through a red dirt valley under whispering conifer pines. 

Yesterday I wanted to kill people.