Orthodoxy: Adherence to accepted norms; specifically creeds. In other words "right beliefs."
Orthopraxy: Emphasis on action/activity. In other words "right doing."
Earlier in my life I interpreted the entire Christian faith and Bible through the lens of Ephesians 2:8 "For by grace you have been saved, through faith; and that not of yourself. It is a gift of God." But I no longer just accept what I was taught in church, I've studied and learned how to think, not just what to think.
Ephesians is credited to the apostle Paul; probably the second most influential person in Christianity (after Jesus, of course). But I no longer interpret the Bible through this lens for two main reasons:
1) Paul never met Jesus, he only learned about Jesus from the teachings of his disciples. Jesus' own teaching (up next) contradicts this idea.
2) Most Biblical scholars don't even think Paul wrote Ephesians, that it was written by someone claiming to be Paul. (This is fairly common and immensely interesting. If you want to know more about this, I highly recommend Forged: Writing in the Name of God - Why the Bible's Authors Are Not Who We Think They Are.)
So what did Jesus teach? After all the Christian faith is about following Jesus and being Christ-like.
When asked what the most important commandment is, Jesus didn't name any of the 10 commandments, he said "Love God with all your heart, all your soul and all your mind." Followed immediately by "Love your neighbor as yourself." (Matthew 23:37-39)
Jesus taught a radical message of love. You can't love anyone by just quietly believing it in your heart and never expressing that love! If your spouse says they love you but they never hold your hand or kiss you good night, you wouldn't feel very loved.
Today, I understand the Bible and more specifically the person of Jesus through the lens of Matthew 25:35-45 "For I was hungry and you gave me something to eat, I was thirsty and you gave me something to drink, I was a stranger and you invited me in, I needed clothes and you clothed me, I was sick and you looked after me, I was in prison and you came to visit me. Then the righteous will answer him 'Lord, when did we see you hungry and feed you, or thirsty and give you something to drink? When did we see you a stranger and invite you in, or needing clothes and cloth you? When did we see you sick or in prison and go visit you?' The King will reply, 'Truly I tell you, whatever you did for the least of these brothers of mine, you did for me.'" (repeat for those who did NOT do these things)
The best part of this description is the people who did the good deeds were surprised to learn this pleased the lord! They didn't care for their fellow man because they expected eternal reward or public recognition, they just did these things because they were the right things to do.
If you profess to love Jesus with all your heart and yet you proclaim the poor deserve their lot and refuse to help them, that is not Christ-like. If you believe Jesus died for your sins but you spend your weekends in strip clubs, that is not following his teachings.
Remember "If you love me, keep my commandments." John 14:15
So there you go, that's my opinion. What's yours?