The time machine hasn't been invented yet, but there's still probably someone who can visit you from the future to help you pursue a life that matters. Anyone who has been down the road you're traveling can help you avoid its pitfalls. A lot of people have advice, but you need people with a track record for wise thinking and, more importantly, wise behavior.

Grandparents. Teachers. Pastors. Counselors. Mentors. Seek out a friend who has at least twenty years on you and pursue them until they tell you all their secrets for living well. A lot of wise people have written books. Use them as guides. God is pretty wise and He wrote a book.

The whole point is for these principles to make your life better. The best proof will be found in people who've lived them out and are better for it.

Do you want to be wise? Spend time with people who have lived a life that matters.