The Bible tells us in Song of Solomon, not to open love before it is time. If we did this it would be “concupiscence,”(Col 3:5) which in the greek is ”a longing (especially for what is forbidden): – concupiscence, desire, lust (after). ” or “ to set the heart upon.”
If our longing is pure, we do not long for it beyond what the Lord has allowed for us at that time. But only ask for His will in the matter. For instance, 2 Sam 2:4-10 and Job 1:21,”He gives and He takes away”.
So, is this the only place that we need to guard our hearts? Eph. 6:14, “having on the breastplate of righteousness.” A breastplate in battle was to protect the inner organs, as spiritually the “breastplate of righteousness” is to protect the inward workings of the Lord in us. If we allow anything to distract us, it could cause us to fall into this sin of concupiscence, among other sins. So “let us hold fast the profession of our faith” (Heb. 10:23), looking unto the author of our salvation. To love the world and its sins thereof is to be an enemy to God. So while living in this world, we are given hope to eternal salvation in which guarding our hearts will no longer be necessary, but until that day it is necessarily so.
The only way to protect ourselves from the sin of concupiscence, among other sins, is to wear His righteousness. Let us hold fast to the sound doctrine of our Lord Jesus Christ, knowing and hoping that He is able to keep us unto the day of redemption when the sins of this world will no longer be a temptation.
The earthly will never save, but only that which is stretching forth to our heavenly calling of being righteous and holy. The only way to escape the corruption of the lusts of this world is to put on the divine nature (2 Pet. 1:4).
But now, after that ye have known God, or rather are known of God,how turn ye again to the weak and beggarly elements, whereunto ye desire again to be in bondage? Gal 4:9
For God hath not given us the spirit of fear; but of power, and of love, and of a sound mind. 2Ti 1:7