As far as the laws of mathematics refer to reality, they are not certain, and as far as they are certain, they do not refer to reality.
Knowledge is dead; the school, however, serves the living.
But love brings much happiness - much more so than pining brings pain.
The right to search for truth implies also a duty.
Matter is spirit reduced to point of visibility.
Marvellous, what ideas the young people have these days. But I don't believe a word of it.