Although Triad is an instrumental song, it still well closes off the trilogy of Disposition and Reflection well. The way I see it, Disposition is the beginning of the mind or the soul (the childhood, you could say, also shown in Lateralus "in my infancy"), where you have no experience with the world, you go entirely off of what you're told. Therefore, how you see the world (the "weather", or your "disposition") changes depending on what you're told, or what is "mention[ed] [..] to [you]". Reflection, then is the maturing of the soul. The adulthood, if you will, where you (possibly) realise that you don't need all of the things you think you do, and that selfishness and narcissism will do you little, but that instead you need to remove your ego (also known as your "self" per Carl Jung, whom Tool seems to have much interest in) to see the unified consciousness of man. This song feels like the explosion of reality that comes when you see this. All of a sudden, everything opens up to you, everything seems new again, you see all the things you were missing, and it all explodes with the energy of the song.
Although Triad is an instrumental song, it still well closes off the trilogy of Disposition and Reflection well. The way I see it, Disposition is the beginning of the mind or the soul (the childhood, you could say, also shown in Lateralus "in my infancy"), where you have no experience with the world, you go entirely off of what you're told. Therefore, how you see the world (the "weather", or your "disposition") changes depending on what you're told, or what is "mention[ed] [..] to [you]". Reflection, then is the maturing of the soul. The adulthood, if you will, where you (possibly) realise that you don't need all of the things you think you do, and that selfishness and narcissism will do you little, but that instead you need to remove your ego (also known as your "self" per Carl Jung, whom Tool seems to have much interest in) to see the unified consciousness of man. This song feels like the explosion of reality that comes when you see this. All of a sudden, everything opens up to you, everything seems new again, you see all the things you were missing, and it all explodes with the energy of the song.