Quote by Kant, Immanuel
"There is a duty to be cultivated with special care—the duty of gratitude."
More from Kant, Immanuel
"Act only according to that maxim whereby you can at the same time will that it should become a universal law."
"Sapere aude! Dare to know! Have the courage to use your own understanding."
"Two things awe me most: the starry sky above and the moral law within."
"I am never content with myself in relation to my knowledge and virtue."