For the law of the Spirit of life in Christ Jesus hath made me free from the law of sin and death.  For what the law could not do, in that it was weak through the flesh, God sending his own Son in the likeness of sinful flesh, and for sin, condemned sin in the flesh:  That the righteousness of the law might be fulfilled in us, who walk not after the flesh, but after the Spirit.  For they that are after the flesh do mind the things of the flesh; but they that are after the Spirit the things of the Spirit.  For to be carnally minded is death; but to be spiritually minded is life and peace.
Watch and pray, that ye enter not into temptation: the spirit indeed is willing, but the flesh is weak.
Temptation is when the weakness of your flesh does not allow the will of the spirit to be done.
You can’t feed/sow into your flesh and expect to reap a spiritual harvest.
We all have 2 natures:
Whichever nature you feed the most will become the strongest. Feed your spirit with the Word of God.
We all have weaknesses.
 Let no man say when he is tempted, I am tempted of God: for God cannot be tempted with evil, neither tempteth he any man:  But every man is tempted, when he is drawn away of his own lust, and enticed.
The enemy doesn’t tempt and entice you with something you don’t have a lust for.
 Then when lust hath conceived, it bringeth forth sin: and sin, when it is finished, bringeth forth death.
The enemy wants to bring death and destruction.
The enemy wants to use your weakness as his point of entry into your life.
By identifying our weaknesses, we can gain insight into the areas the enemy will try to gain entry into our lives.
Your weakness will cause you to become friends with the wrong people.
You need people in your life that will not tolerate your weakness.
Your weakness will make you uncomfortable in the presence of those that justify your weakness.
What is permitted is endorsed.
 Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap.  For he that soweth to his flesh shall of the flesh reap corruption; but he that soweth to the Spirit shall of the Spirit reap life everlasting.  And let us not be weary in well doing: for in due season we shall reap, if we faint not.
Weaknesses attract relationships that will allow it grow.
If left unchecked your weakness will grow.
1 Corinthians 5:6-7
 Your glorying is not good. Know ye not that a little leaven leaveneth the whole lump?  Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened. For even Christ our passover is sacrificed for us:
1 Corinthians 10:13
 There hath no temptation taken you but such as is common to man: but God is faithful, who will not suffer you to be tempted above that ye are able; but will with the temptation also make a way to escape, that ye may be able to bear it.
 Then was Jesus led up of the Spirit into the wilderness to be tempted of the devil.  And when he had fasted forty days and forty nights, he was afterward an hungred.  And when the tempter came to him, he said, If thou be the Son of God, command that these stones be made bread.  But he answered and said, It is written, Man shall not live by bread alone, but by every word that proceedeth out of the mouth of God.  Then the devil taketh him up into the holy city, and setteth him on a pinnacle of the temple,  And saith unto him, If thou be the Son of God, cast thyself down: for it is written, He shall give his angels charge concerning thee: and in their hands they shall bear thee up, lest at any time thou dash thy foot against a stone.  Jesus said unto him, It is written again, Thou shalt not tempt the Lord thy God.  Again, the devil taketh him up into an exceeding high mountain, and sheweth him all the kingdoms of the world, and the glory of them;  And saith unto him, All these things will I give thee, if thou wilt fall down and worship me.  Then saith Jesus unto him, Get thee hence, Satan: for it is written, Thou shalt worship the Lord thy God, and him only shalt thou serve.  Then the devil leaveth him, and, behold, angels came and ministered unto him.