having nothing and possessing all things,

In so far as we understand, we can desire nothing but that which must be, nor, in an absolute sense, can we find contentment in anything but truth.

We have got to realise the littleness of creation and to see it for the nothing that it is before we can love and possess God who is uncreated. This is the reason why we have no ease of heart or soul, for we are seeking our rest in trivial things which cannot satisfy, and not seeking to know God, almighty, all-wise, all-good. He is true rest. It is His will that we should know Him, and His pleasure that we should rest in Him. Nothing less will satisfy us. [...] We shall never cease wanting and longing until we possess Him in fullness and joy. Then we shall have no further wants. Meanwhile His will is that we go on knowing and loving until we are perfected in heaven. [...] The more clearly the soul sees the blessed face by grace and love, the more it longs to see it in its fullness.

I am dead because I lack desire,
I lack desire because I think I possess.
I think I possess because I do not try to give.
In trying to give, you see that you have nothing;
Seeing that you have nothing, you try to give of yourself;
Trying to give of yourself, you see that you are nothing:
Seeing that you are nothing, you desire to become;
In desiring to become, you begin to live

How blissful it is, for one who has nothing. Attainers-of-wisdom are people with nothing. See him suffering, one who has something, a person bound in mind with people.

Those who are possessed by nothing possess everything.

To be without desire is to be content. But contentment is not happiness. And in contentment there is no progress. Happiness is to desire something, to work for it, and to obtain at least a part of it.

When one does not have what one wants, one must want what one has.

Freedom is not procured by a full enjoyment of what is desired, but by controlling the desire.

Perhaps when we find ourselves wanting everything, it is because we are dangerously close to wanting nothing.

You say I am repeating
Something I have said before. I shall say it again.
Shall I say it agian? In order to arrive there,
To arrive where you are, to get from where you are not,
You must go by a way wherein there is no ecstasy.
In order to arrive at what you do not know
You must go by a way which is the way of ignorance.
In order to possess what you do not possess
You must go by the way of dispossession.
In order to arrive at what you are not
You must go through the way in which you are not.
And what you do not know is the only thing you know
And what you own is what you do not own
And where you are is where you are not.

And that taught me you can't have anything, you can't have anything at all. Because desire just cheats you. It's like a sunbeam skipping here and there about a room. It stops and gilds some inconsequential object, and we poor fools try to grasp it - but when we do the sunbeam moves on to something else, and you've got the inconsequential part, but the glitter that made you want it is gone.

To know nothing is the only happiness,

To know means to know all. Not to know all means not to know. In order to know all, it is only necessary to know a little. But, in order to know this little, it is first necessary to know pretty much.