No matter where you are in life right now, know this: God put you on this earth to fulfill the promise He has predestined for your life.
To me, it looks like he means God planned in advance what He will do with each person in this life. TD here is not talking about predestination of where someone will spend eternity.
If he means this, this can mean God is the One really in control of each person's life; and
"God is love", right? (in 1 John 4:8&16); so this would mean love is in control of what becomes of every person's life. And I would say this is good, how love is winning over our selfish stuff.
By the way, we do see how human love can destine things. If you fall in love with someone, this can decide a lot of future things

Even at the human level, love can control quite a lot!
An example of how God's love can win out is how things worked out for Joseph > Genesis 37-50. Things worked out for Joseph and with God's all-loving result. The hate of Joseph's brothers did not, really, decide or control things. But things came out according to God's intentions.
Many lives were saved, plus Joseph got reconciled with his brothers.
So, yes I can see how God . . . who is love . . . destines and therefore controls how things go for us in our lives.
But . . . also . . . we have Romans 8:29 >
"For whom He foreknew, He also predestined to be conformed to the image of His Son, that He might be the firstborn among many brethren." (Romans 8:29)
So, our Heavenly Father has destined His children to become like Jesus. This predestination goes beyond what becomes only of an individual, in one's life or where he or she will spend eternity. This has to do with what is predestined for Our Father and Jesus. So, for us who will be included in this, there is more involved than simply if we go to Heaven or not.
What brought God to so destine His children? I understand that our Father so dearly treasured His Son, that He wanted to have many children who are pleasing to Him like Jesus is, who can relate in love with our Father the way Jesus relates with our Heavenly Father. So . . . like I have offered > love destined that there will be many who are and who love like Jesus.
And we can see how God in all His creativity of love will not be stopped by any evil and hate. And with Him we succeed in all He is committed to

We share with Him in His love destiny, more and more
