Christianity taught only what the whole of Asia knew already long before and even better. - Arthur Schopenhauer

Ordinary people merely think how they shall 'spend' their time; a man of talent tries to 'use' it.

... life may be compared to a piece of embroidery, of which, during the first half of his time, a man gets a sight of the right side, and during the second half, of the wrong. The wrong side is not so pretty as the right, but it is more instructive; it shows the way in which the threads have been worked together

As the biggest library if it is in disorder is not as useful as a small but well-arranged one, so you may accumulate a vast amount of knowledge but it will be of far less value to you than a much smaller amount if you have not thought it over for yourself; because only through ordering what you know by comparing every truth with every other truth can you take complete possession of your knowledge and get it into your power. You can think about only what you know, so you ought to learn something; on the other hand, you can know only what you have thought about.