“Watch over your heart with all diligence, for from it flow the issues of life.” Proverbs 4:23
But HOW shall the heart be kept right?
First of all, remember that He who made the heart, can alone fashion and dispose it to that which is good. Whatever is amiss, He knows how to remedy it: He gives it a new mainspring–He puts within it the love of Christ, instead of the love of the world; He sends His Holy Spirit to control and order its unruly passions and affections; He can cleanse it from all its defilements; When the chain is off the wheel, He can replace it–I mean, when something has turned our desires from their right object, He can restore them.
Then ask earnestly for grace, “Create in me a clean heart, O God! Incline my heart to Your testimonies! Let my heart be sound in Your statutes that I may honor You!”
But then, He bids us to be workers together with Him in this matter. There is that which He alone can do–but there is that which is our part by His grace to do also.
You must take care not to run into scenes of temptation. If a man carried a bag of gunpowder with him, he would be very careful not to go where sparks were flying about–he would feel that in a moment a spark might be his destruction.
Now your heart is very like that gunpowder–a little thing may set it all alight with evil passions! Words may be spoken that may arouse unholy thoughts or desires–therefore be careful. Never go near places where the devil is accustomed to come. Keep far away from the theater, the dancing-room, and never enter the bar of a tavern if you can avoid it.