The Christian life is never stagnant. Once we accept Jesus we must continue to be vigilant in the choice to follow after Him. As we grow in our understanding of who He is, the Bible, and grow strong ties to other Believers then deep roots of faith grow in our lives. When we are rooted in our faith we are able to stand strong when we go through the storms of this life.
And now, just as you accepted Christ Jesus as your Lord, you must continue to follow him. Let your roots grow down into him, and let your lives be built on him. Then your faith will grow strong in the truth you were taught, and you will overflow with thankfulness.
~ Colossians 2:6-7 [NLT]