This is true because he already knew his people and had already appointed them to have the same form as the image of his Son. Therefore, his Son is the firstborn among many children.
He also called those whom he had already appointed. He approved of those whom he had called, and he gave glory to those whom he had approved of. (Romans 8:28-30 GW)
Certain Scriptures are quoted often because they resonate with people in a special way. They are cherished, significant, considered as favorites, even called life verses. But when any Bible verse is personalized, it tends to lose its original meaning.
The verses above could be taken as if all that happens in life is destined to happen. Many religions in the world see life as a set of destinies. This leads to a loss of free will and individual responsibility. The Christian faith is distinctly different.
Godly direction and destiny are two very different things. Paul gave these verses as encouragement for believers who faced various trials and testings of their faith. He reminded them, and us, that God has a divine plan and we fit into it. But it is not set in cement.
God allows trials and tests in a believer's life for a purpose. They are neither random, nor fixed. They shape a person's purpose in life, God's purpose, yet without restricting our free will and personal responsibility.
He doesn't force us into a certain predetermined destiny, but provides direction for us to become whom He created us to be. ©Word-Strong_2016