in Thoreau’s Journal:

I do not remember any page which will tell me how to spend this afternoon.  I do not so much wish to know how to economise time as how to spend it, by what means to grow rich, that the day may not have been in vain…

My profession is to be always on the alert to find God in nature, to know his lurking-places, to attend all the oratorios, the operas, in nature.