Hawzah News Agency – The commander of the faithful Imam Ali peace be upon him says:

البَلاغةُ ما سَهُلَ على‏ المَنطِقِ وخَفَّ على‏ الفِطْنَةِ.

'Eloquence is that which is easy [for the speaker] to pronounce and light on the [listener's] intellect.'

Source: Ghurar al-Hikam, no. 1881