In plain words
Understand in this way what stands above the intellect, and steady the mind by the intellect in the Self. Then, Vijaya of clear mind, you will conquer the true enemy that takes the form of desire and is so hard to overcome.
Word for word
Wise Vijaya, thus understanding [the Self's] superiority to intellect, establish the mind in the Self through intellect and conquer the form of desire, the true enemy difficult to overcome.