Kierkegaard

One can very well eat lettuce before its heart has been formed; still, the delicate crispness of the heart and its lovely frizz are something altogether different from the leaves. It is the same in the world of the spirit. Being too busy has this result: that an individual very, very rarely is permitted to form a heart; on the other hand, the thinker, the poet, or the religious personality who actually has formed his heart, will never be popular, not because he is difficult, but because it demands quiet and prolonged working with oneself and intimate knowledge of oneself as well as a certain isolation.
- Kierkegaard