The heart belongs to Jesus. He has paid an infinite price for the soul; and He intercedes before the Father as our Mediator, pleading not as a petitioner, but as conqueror who would claim that which is His own. He is able to save to the uttermost, for He ever lives to make intercession for us. A young heart is a precious offering, the most valuable gift that can be presented to God. All that you are, all the ability you possess, comes from God a sacred trust, to be rendered back to Him again in a willing, holy offering. You cannot give to God anything that He has not first given you. Therefore when the heart is given to God, it is giving to Him a gift which He has purchased and is His own. MYP 407.1
There are many claimants to the time, the affections, and the strength of youth. Satan claims the youth as his property, and a vast number render to him all the ability, all the talent, they possess. The world claims the heart; but that heart belongs to the One who redeemed it. If given to the world, it will be filled with care, sorrow, and disappointed hopes; it will become impure and corrupted. It would be the worst kind of robbery to give to the world your heart's affections and service, for they belong to God. You cannot with profit give your heart to pleasure-seeking. MYP 407.2
The enemy of righteousness has every kind of pleasure prepared for youth in all conditions of life; and they are not presented alone in crowded cities, but in every spot inhabited by human beings. Satan loves to secure the youth in his ranks as soldiers. The arch fiend well knows with what material he has to deal; and he has displayed his infernal wisdom in devising customs and pleasures for the youth which will separate their affections from Jesus Christ.... MYP 407.3