David

“Live as if you were living already for the second time and as if you had acted the first time as wrongly as you are about to act now!" It seems to me that there is nothing which would stimulate a man's sense of responsibleness more than this maxim, which invites him to imagine first that the present is past and, second, that the past may yet be changed and amended.”
― Viktor Frankl

“Control of consciousness determines the quality of life.”
― Mihaly Csikszentmihalyi, Flow: The Psychology of Optimal Experience

“Everything can be taken from a man but one thing: the last of the human freedoms—to choose one’s attitude in any given set of circumstances, to choose one’s own way.”
― Viktor E. Frankl, Man's Search for Meaning

“Most enjoyable activities are not natural; they demand an effort that initially one is reluctant to make. But once the interaction starts to provide feedback to the person's skills, it usually begins to be intrinsically rewarding.”
― Mihaly Csikszentmihalyi, Flow: The Psychology of Optimal Experience