Sanskrit: सजातीयप्रवाहश्च विजातीयतिरस्कृतिः।  नियमो हि परानन्दो नियमात्क्रियते बुधैः।   
English:  The continuous flow of only one kind of thought to the exclusion of all other thoughts, is called Niyama, which is verily the supreme bliss and is regularly practiced by the wise.