From “A Poet’s advice to Students“:
Almost anybody can learn to think or believe or know, but not a single human being can be taught to feel. Why? Because whenever you think or you believe or you know, you’re a lot of other people: but the moment you feel, you’re nobody-but-yourself.
To be nobody-but-yourself-in a world which is doing its best, night and day, to make you everybody else-means to fight the hardest battle which any human being can fight; and never stop fighting.
― E.E. Cummings