You will have to fight the enemies of your soul to the end, if you are to make the glorious finish on which you are calculating. How you are to do it so as to be brought off “more than conqueror” (Romans 8:37) is a most important question.
The first thing I advise is to find out the places in your heart and character where you are most in danger of being overcome. Every man, woman, or child has his or her most easily besetting sin, that is, some point in their thinking, feeling, or acting where they are weakest, and therefore likely to be most easily led into the doing of evil. You can be quite sure that the devil has discovered that place already, and you can be equally sure that that is the spot where he will be most likely to attack you.
Watch against unexpected attacks. Some of the most serious defeats in war have resulted from an insufficient lookout. “Taken by surprise” has been the reason given for any number of disasters. The same neglect of watchfulness will account for no end of defeats and backslidings in religion.
Resist the first beginnings of sin. The danger lies in the first glass, the first word, nay, often in the first look. The moment your conscience testifies to the presence of the tempter, stand on your guard, and resist the foe. With many temptations there is only safety in flight; arguments are useless, nay, dangerous.
Perhaps more people go wrong by dallying with the beginnings of evil than in any other way.
Keep out of circumstances, and away from places, in which you know you are likely to be tempted. Nothing can compare with the folly displayed by some who voluntarily associate with companions, relations and friends whom they know will tempt them to do, or allow things to be done which are wrong, or go into places where they know they will be tempted by the very things which have been their ruin in days gone by.
In the darkness and depression of temptation tell your case to the Savior. You can be sure of His sympathy. “Because He himself suffered when He was tempted, He is able to help those who are being tempted” (Hebrews 2:18).
William Booth, The Warrior’s Daily Portion