The Christian is the partaker of the greatest gift in human history – God’s grace. A sad byproduct of grace can sometimes be sloppiness on the part of the recipient. People can get lax, neglectful, and take their faith in a very casual manner. Those are three words that are never found in the Bible and never meant to describe the follower of Jesus. Instead, it says:
Let love be genuine. Abhor what is evil; hold fast to what is good. Love one another with brotherly affection. Outdo one another in showing honor. Do not be slothful in zeal, be fervent in spirit, serve the Lord.
Romans 10:9-11 ESV
Our faith is not a competition but it should be something that is propelling us forward. Progress is never casual, lax, or neglectful. The key contrast in the above quotation is between slothful and zeal. The Believer should be extremely zealous for the Lord and the mission we’ve been placed here for. We should be growing love for God and for others. We should be more about others and less about ourselves every year we get closer to the Lord. To have zeal is to have great energy or enthusiasm in pursuit of a cause or an objective. Our cause is to know Christ and to make Him known to the world. Our objective is humanity set free from the bondage of sin and death through a relationship with Jesus.
…and so, from the day we heard, we have not ceased to pray for you, asking that you may be filled with the knowledge of his will in all spiritual wisdom and understanding, so as to walk in a manner worthy of the Lord, fully pleasing to him: bearing fruit in every good work and increasing in the knowledge of God; being strengthened with all power, according to his glorious might, for all endurance and patience with joy…
Colossians 1:9-11 ESV
We need to be growing in knowledge and wisdom. We need to be bearing fruit. We need to be experiencing His Holy Spirit power working in us. This is not the description of a sloppy Christian, this is someone who is in love with their Savior.