Do you want more and more of God's kindness and peace? Then learn to know Him better and better. For as you know Him better, He will give you, through His great power, everything you need for living a truly good life: He even shares His own glory and His own goodness with us! And by that same mighty power He has given us all the other rich and wonderful blessing He promised ... But to obtain these gifts, you need more than faith; you must also work hard to be good, and even that is not enough. For then you must learn to know God better and discover what He wants you to do.
- 2 Peter 1:2-5

To know God better, we have to spend time with Him. Obey and serve Him! We are saved by grace through faith. However, we grow closer to Him as we follow His will.