Say: Allah. Then leave them to their playing.
{Qur'an, 6:91}

Verily in the remembrance of Allah do hearts find rest.
{Qur'an, 13:28}

...

One of the brethren said to me, ‘I am nothing!’ I said to him, ‘Don’t say “I am nothing”, and don’t say “I am something”. Don’t say “I need something”, or “I don’t need anything”; rather say “Allah!” and you will see wonders.’

Shaykh Mawlay al-'Arabi al-Darqawi, The Darqawi Letters

...

Shaikh Abul-Hasan ash-Shadhili, one of the greatest Sufi Shaikhs, was asked by his shaikh, "O my son, with what are you going to meet your Lord?" He said, "I am coming to Him with my poverty." He said,

"O my son, do not ever repeat this again. This is the biggest idol, because you are still coming to Him with something. Free yourself of everything and then come to Him."

Divine Wisdoms, On Hidden Polytheism

...

The blows of love play tricks on men

And destroy them stage by stage.

I asked: am I acceptable?

The elders said, Make yourself empty.

Shaykh al-'Alawi