It is never too old to learn. There is no end to learning (live until you are old, learn until you are old)

Not to advance is yo go back. No progress is equivalent to retreat. (If you don’t advance, you will retreat)

To know everything is to know nothing. To know everything and be loose in everything (It is better to know everything than to know nothing)

To know oneself is true progress. To save time is to lengthen life. To save time is to lengthen life.