Explaining Matt 5:28
Matt 5:28 - But I say unto you, That whosoever looketh on a woman to lust after her hath committed adultery with her already in his heart.
Every one that looketh distinguishes the person whose glance is not checked by holy restraint, and who forms; who develops and materializes the impure purpose/intention of lusting after her. The act of fornication will follow (after adultery of the heart) when opportunity occurs. Jesus wanted his hearers to see that the real source of sin lies not in the physical organ, but in the heart
Lust After - Strong’s Greek Hebrew Dictionary - #1937 epithumeo (ep-ee-thoo-meh'-o); to set the heart upon, i.e. long for (rightfully or otherwise):
KJV-- covet, desire, would fain, lust (after).
Adultery, in God’s Word, is "always" defined as leaving the person, or the God one had chosen as “their” God or spouse. The one whom “they” gave allegiance/faithfulness to, whether it be to God, or to a man or to a woman.
An example would be that a couple got married. Supposed the man was a professing Christian. Later on this man was to lean towards Catholicism. His “heart” was into Mary worship and other Roman Catholic traditions, but in order to please his wife, he continued to go to this Christian church and go through the motions of worshiping the One True God. He was not actually, physically, outwardly, worshipping the Roman Catholic gods, but he was “in his heart”.
This man had already committed adultery against God. WHY? Because he gave his “heart” (love-affection-devotion) to another god.
Same with a husband and wife. If one lusts after another “in the heart” one has already committed adultery. WHY? Because he/she has given their affection to another. The one had already “departed” the other in their heart.
Some synonyms for “feel affection for” are love, devotion, adore and worship. THIS IS ADULTERY.
Even though this man in the example did not go through with the actual physical motions of worshipping this “other” god, he was guilty of the act.
If a man or a woman lustfully departs "physically", or "in the heart", this is adultery. If this can be reconciled between the two, if the erring one repents and is forgiven and returns to the spouse “in the heart”, this is no longer adultery.
I believe the temptation to commit fornication is not the lust spoken of in Matt 5:28. Temptation in “itself” is not a sin if resisted. (1 Cor 10:13) The way some women act and dress can be a temptation to a man. The way some men flirt and sweet talk/charm can be a temptation to a woman. We all must resist these “come on’s”.
You don’t understand what I’m talking about? Jesus Christ does.
Heb 4:14 - Seeing then that we have a great high priest, that is passed into the heavens, Jesus the Son of God, let us hold fast our profession.
Heb 4:15 - For we have not an high priest which cannot be touched with the feeling of our infirmities; but “was in all points (every way) tempted like as we are”, yet without sin.
Heb 4:16 - Let us therefore come boldly unto the throne of grace, that we may obtain mercy, and find grace to help in time of need.
Christ is in the sanctuary as our high priest. His right to this position is guaranteed by his death (including the shedding of his blood) and resurrection. He has passed through the heavens into the presence of God. He is there not only as the Son of God, but also as the Son of man. In his perfect humanity he is familiar with our needs, cares, temptations, and problems, because he was tempted without succumbing/yielding to the temptation. He knows all about sin without having sinned. His final awareness with sin came when he took our sin upon himself at Calvary. (2 Cor 5:21)