When you have overcome one temptation, you must be ready to enter the lists with another. As distrust, in some sense, is the mother of safety, so security is the gate of danger.
Ahab cast a covetous eye at Naboth's vineyard, David a lustful eye at Bathsheba. The eye is the pulse of the soul; as physicians judge of the heart by the pulse, so we by the eye; a rolling eye, a roving heart. The good eye keeps minute time, and strikes when it should; the lustful, crochet-time, and so puts all out of tune.
It is true that Satan often uses the flesh to secure the consent of man, yet in each instance of enticement the enemy creates some kind of thought by which to induce the man. We cannot separate temptation and thought. All temptations are offered us in the form of thoughts. Since the latter are so exposed to the power of darkness, we need to learn how to guard them.
Let our hearts admit, "I am poor and weak. Satan is too subtle, too cunning, too powerful; he watches constantly for advantages over my soul. The world presses in upon me with all sorts of pressures, pleas, and pretences. My own corruption is violent, tumultuous, enticing, and entangling. As it conceives sin, it wars within me and against me. Occasions and opportunities for temptation are innumerable. No wonder I do not know how deeply involved I have been with sin. Therefore, on God alone will I rely for my keeping. I will continually look to Him.
If we do not abide in prayer, we will abide in temptation. Let this be one aspect of our daily intercession: "God, preserve my soul, and keep my heart and all its ways so that I will not be entangled." When this is true in our lives, a passing temptation will not overcome us. We will remain free while others lie in bondage.
To believe that He will preserve us is, indeed, a means of preservation. God will certainly preserve us, and make a way of escape for us out of the temptation, should we fall. We are to pray for what God has already promised. Our requests are to be regulated by His promises and commands. Faith embraces the promises and so finds relief.
Steadfastness in believing doth not exclude all temptations from without. When we say a tree is firmly rooted, we do not say the wind never blows upon it.
We usually know what we can do, but temptation shows us who we are.