You are contradicting yourself. You say you don't know yet you quote 2 Thessalonians as the reason!
And when I say I don't know, you tell me to "read the Bible"! How pathetic. One would think that after catching oneself in self-decpetion so many times, a rational human being would give up the man-made superstition and just accept the world as it is, even if we don't know what it's all about.
Instead, we make up another superstitious feel-good prescription and peddle it as cure-all until we run into another dead end corner...'cause "man's gotta believe in something—anything..."
The “why” of God’s predestination is God’s alone to know.
The “how” is by God’s free gift of grace through faith in Christ.
The fact that I have been given the free gift of grace by faith in Christ is apparent in my life just as you say it is not apparent in your life.