Therefore take up the whole armor of God, that you may be able to withstand in the evil day… – Ephesians 6:13

People who are beginning the Christian life should seek to know where their weak points are. I should not wonder, dear friend, if your weak point lies where you think that you are strong. Where you think, “Oh, I shall never go wrong there!”-that is the very place where you are likely to fall. Set a watch wherever any weakness has appeared; and if you have, in the past of your Christian life, grieved the Holy Spirit by anything wrong, set a double watch there. Where you have tripped once, you may trip again; for you are the same man. Set a watch, also, dear friend, whenever you feel quite secure. Whenever you feel certain that you cannot be tempted in a particular direction, that proves that you are already as proud as Lucifer. Set a watch, set a watch, set a watch. Avoid every occasion of sin. If any course of conduct would lead you into sin, do not go in that direction. I heard a man say, as an excuse for drinking, “You see, if ever I take a glass of beer, I seem to lose myself, and I must have two or three more.” Well, then, if that is the case with you, do not take a glass of beer. “But,” says one, “if I get into company, I forget myself.” Do not go where you are likely to be tempted. “Well,” says one, “but my business calls me into the midst of temptation.” I grant you that your business may compel you to go where there are ungodly men; for how could some live at all, if they had not to come into contact with the ungodly?-they would have to go out of the world. Well, then, if that is your case, put on the whole armour of God, and do not go without being prepared to fight the good fight of faith. Set a watch, set a watch, set a watch. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2254.cfm