Every time we make decisions and choices, it is an act of deciding our future and how it takes its shape.
Every reasonable decision has a life-changing impact that can turn out for good.
Good decisions make a good life and bad decisions make a bad life.
Each time we make decisions, it becomes an investment in our lives.
A good investment would likely result in a good life, and a bad investment results in a bad life.
For instance, investing in education can result in a (wide) variety of good things for an individual. Also, investment in your kids can give them a bright future, etc.
Decisions to commit your life to God can and should result in eternal life.
Thus, our decisions end up being the investment we make to have a meaningful life or a terrible one.
The decision to live a good life is a life-changing investment.