Romans 1
16 For I am not ashamed of the gospel [c]of Christ, for it is the power of God to salvation for everyone who believes, for the Jew first and also for the Greek. 17 For in it the righteousness of God is revealed from faith to faith; as it is written, “The just shall live by faith.”

I imagine I could meditate on this verse for the rest of my life and never fully understand it.

“The just shall live by faith.”

There are very few people living by faith anymore. I think if you boil “faith” down to salvation, then there are some living by faith. However, I believe a life of faith is a much larger concept.

Instead of working yourself to the point of illness, you thank God for what you are capable of and he blesses you with abundance so you can continue working in the church, and spending time with family.
Instead of a 100% reliance on doctors, you pray and thank God for health in your life all the while exercising regularly and eating healthy.

Whenever I think of a life of faith I think about George Mueller. An amazing missionary who ran an orphanage for the Lord. You can read more here:

But here is an excerpt:
More than 10,000 children lived in the orphanage over the years. When each child became old enough to live on his own, George would pray with him and put a Bible in his right hand and a coin in his left. He explained to the young person that if he held onto what was in his right hand, God would always make sure there was something in his left hand as well.