Being able to see everything through his Gnana dhrishti is one of the thousand powers of Kanchi Mahaperiyava. Many times, he clearly knew the future of his followers and advised them accordingly. In fact, in one incident Periyava also said how one boy who asked periyava for Moksha has 6 more births before reaching God's holy feet.
If you just follow Periyava's teachings, your life will change drastically. My personal request is plz be vegetarian, so you can avoid adding more karma in this birth. It's Vallalar's advice too. Let's follow the teachings of these great siddhas and get their blessings and lead a happy life.