Abdullâh b. Mubârak said:

I asked Sufyân Al-Thawrî, “When a man stands to pray, what should he intend by his recitation and prayer?” He replied, “He should intend that he is personally entreating his Lord.”

Muhammad b. Nasr Al-Marwazî, Ta’dhîm Qadr Al-Salâh Vol. 1 p199.