Let not thine heart decline to her ways, go not astray in her paths.
– Proverbs 7:25
To decline is to deviate, to get off course. The heart refers to the mind where the battle is really fought. Once the mind deviates to her course, the person is astray in her way. The mind and heart must be guarded so that no thoughts of the strange woman are entertained. You go astray literally and physically, so Solomon warns to physically stay away, or keep clear of her paths.