Do you know why you are not dead right now? Because God made something in you called the immune system. Your immune system doesn't wait until you get sick to start fighting or until you have a major threat in your life. It fights at the first sign of danger. As soon as it detects the slightest one-cell bacteria, that's it. God's amazing creation of the human body gives us an example of how we should conduct our lives. Don't wait for sin to grow in you, take root, and make you spiritually sick. Fight sin at the first germ, nip it in the bud, when it first creeps into your life. Fight sin when it's a mere thought or temptation. With God's help, be on guard, protect yourself from sin, and keep it away from you. You will then be free to daily live healthy and strong in the Lord, fulfilling the purpose God has given you. It's as simple as learning from the body God gave you. It's as simple as not catching a cold.
From Message #1268 - The Gospel of Microbes & Neutrophils
Always be on guard for the very first signs of sin threatening your walk with God. Fight sin at the very first sign of temptation. Recognize the threat, seal it and put it under the Blood of the Lamb.