What did St. Macarius the Great say about the practice of the Jesus Prayer?

“Always remember the holy name, our Lord Jesus Christ. This is the pearl which the wise merchant purchased (Matt. 13:45–46) by selling all the desires of his heart, brought into the inner rooms of his house, and found it sweeter than honey in his mouth. He who keeps this jewel in his heart shall be granted a great reward in the glory of our Lord Jesus Christ.”