Verse 16

16. There are three fold stages of life, having low, middle and excellent vision; this mode of worship is prescribed for them, out of compassion by the sruti.

This verse refers to different levels of intuition, understanding, perception, discrimination or awareness, any or all of which figure at times in Self Realisation. It is being explained how these varying stages or levels are understood by the Sruti so this is why the scriptures include descriptions of rites, rituals and elements of duality in order to relate to all levels of understanding. The meaning here is that these variations of statements should not cause conflict in interpreting the scriptures but that the higher understanding should emerge grasping the higher meaning, the truth of the Sruti. When that truth is Realised the descriptions designed to encompass all aspirants will not cause confusion. But it should be noted that those seekers who try to gain understanding through the machinations of the mind will encounter apparent contradictions in the scriptures.