But each one is tempted when he is drawn away by his own desires and enticed. Then, when desire has conceived, it gives birth to sin; and sin, when it is full-grown, brings forth death.

Temptation occurs when you are beckoned or enticed from an outside source for the intent of fulfilling a sinful desire within you. Temptation is not a sin, but it should be used as a warning because it is the opportunity to consent to sin. Sinful desires are conceived through unreigned, impulsive, and indulgent thoughts. These uncontrolled thoughts are sin (see Matt. 5:28). However, you can still pray for strength to turn away from the sin at this stage. Desires and thoughts uncontrolled will eventually lead to the actual commission of the act, then the sin has become full grown.  This will lead to spiritual death now and in the end, without true repentance, eternal death. Therefore, do not dwell on wrong thoughts or consider wrong actions. If you are conceiving sin in your mind you are in a dangerous state. If you turn away from the sin, even after planning it, you can receive forgiveness and fulfill righteousness. Pray for strength to overcome any compelling sin in your life or better yet, in your mind.

We may observe hence the power and policy of sin. The word here rendered drawn away signifies a being forcibly haled or compelled. The word translated enticed signifies being wheedled and beguiled by allurements and deceitful representations of things. There is a great deal of violence done to conscience and to the mind by the power of corruption: and there is a great deal of cunning and deceit and flattery in sin to gain us to its interests. The force and power of sin could never prevail, were it not for its cunning and guile. Sinners who perish are wheedled and flattered to their own destruction. And this will justify God for ever in their damnation, that they destroyed themselves. Their sin lies at their own door, and therefore their blood will lie upon their own heads.

The success of corruption in the heart (v. 15): Then, when lust hath conceived, it bringeth forth sin; that is, sin being allowed to excite desires in us, it will soon ripen those desires into consent, and then it is said to have conceived. The sin truly exists, though it be but an embryo. And, when it has grown to its full size in the mind, it is then brought forth in actual execution. Stop the beginnings of sin, or else all the evils it produces must be wholly charged upon us.

The final issue of sin, and how it ends: Sin, when it is full grown, brings forth death. After sin is brought forth in actual commissions, the finishing of it (as Dr. Manton observes) is its being strengthened by frequent acts and settled into a habit. And, when the iniquities of men are thus filled up, death is brought forth. There is a death upon the soul, and death comes upon the body. And, besides death spiritual and temporal, the wages of sin is eternal death too. Let sin therefore be repented of and forsaken, before it be finished.

Reference Verses

Ps 7:14 --Behold, the wicked brings forth iniquity; yes, he conceives trouble and brings forth falsehood.

Isa 59:4--No one calls for justice, nor does any plead for truth. They trust in empty words and speak lies; they conceive evil and bring forth iniquity.

Micah 2:1--Woe to those who devise iniquity, and work out evil on their beds! At morning light they practice it, because it is in the power of their hand.

Matt 5:28--"But I say to you that whoever looks at a woman to lust for her has already committed adultery with her in his heart.