Many are the plans in the mind of a man, but it is the purpose of YHWH that will stand.
Proverbs 19:21

The most resolute man who has ever lived can't do a single thing to change God's predetermined course of history. He gives us a lot of leeway in our day to day affairs, so it's good to plan and work toward our goals, but always be ready to pivot if you discover that God has something different in mind.