Thanks are the highest form of thought.
The aim of life is appreciation; there is no sense in not appreciating things; and there is no sense in having more of them if you have less appreciation of them.
The fact is that purification and austerity are even more necessary for the appreciation of life and laughter than for anything else. To let no bird fly past unnoticed, to spell the stones and weeds, to have the mind a storehouse of sunset, requires a discipline in pleasure and an education in gratitude.