The highest and most beautiful things in life are not to be heard about, nor read about, nor seen but, if one will, are to be lived.

If the ethical - that is, social morality- is the highest ... then no categories are needed other than the Greek philosophical categories.

This fact, that the opposite of sin is by no means virtue, has been overlooked. The latter is partly a pagan view, which is content with a merely human standard, and which for that very reason does not know what sin is, that all sin is before God. No, the opposite of sin is faith.

It is (to describe it figuratively) as if an author were to make a slip of the pen, and as if this clerical error became conscious of being such. Perhaps this was no error but in a far higher sense was an essential part of the whole exposition. It is, then, as if this clerical error were to revolt against the author, out of hatred for him, were to forbid him to correct it, and were to say, "No, I will not be erased, I will stand as a witness against thee, that thou art a very poor writer."

It is perfectly true, as philosophers say, that life must be understood backwards. But they forget the other proposition, that it must be lived forwards.

Patience is necessary, and one cannot reap immediately where one has sown.

I see it all perfectly; there are two possible situations - one can either do this or that. My honest opinion and my friendly advice is this: do it or do not do it - you will regret both.