The man who goes on the principle of gratifying his passions as much as he can short of mortal sin, will never stop there. He will overleap his boundary, as surely as the sun goes down at the close of day, as surely as the water that eats out the sand from the foundations of a house will finally bring it to ruin. {274} Such a person is not only in danger of ruin in the world to come, but loses the peace and consolation which the servants of God ought to have in this world. There is too much selfishness about him. He is trying to join together two things as contrary as God and the world--an impossibility, as God Himself says: "_No man can serve two masters, for either he will love the one and hate the other, or he will hold to the one and despise the other. Ye cannot serve God and mammon_." [Footnote 117] [Footnote 117: Matt. vi., 24.] Now, the Lord intended to remove these evils, to show us a sure and safe way to everlasting life, and to fill our souls habitually with a heavenly peace and consolation, by enjoining on us to fulfil this commandment with perfection, and, as the words sound--"_with all our hearts, and with all our souls, and with all our mind, and with all our strength_." I think this is enough to prove conclusively the necessity of such fulfilment; now let us see how it is to be done. {275} But, at the very outset, a great repugnance and distaste will arise, I doubt not, in the minds of many, at hearing these strong words of the text. It will seem to be asking too much--more than they can dream of fulfilling. In their idea, it would seem an impossibility, even if they had the best will in the world. "What," says the father of a family, "give my whole soul and mind to God? To take care of my children, to put bread in their mouths and clothes on their backs, takes up, and must take up the principal part of my time and attention. I must attend to my business, and use all my skill and prudence and activity to make all things meet. I can not do as the old hermits of the desert did, pass my time in constant prayer and meditation." "What," says the mother, "give all my strength and all my mind to God! How can I do it? I must expend all my strength going up and down stairs, in the kitchen, in the dining-room, in my own room sewing and mending, to keep every thing decent for the children. I must teach them, and look out for them. One thing or another takes up my time and attention the whole day, so that, when night comes round, I am glad enough to get to bed and to sleep as quick as I can." {276} "What," says the young woman, just growing out of her girlhood, "give my whole heart to God, when this dear old world is so pleasant, and I have such fine times in it?" Alas! not the young woman only, but the young man, and the old man and the old woman, too, are apt enough to speak in this way. Dissipation and pleasure keep such a hold upon them, that they seem to be more giddy and foolish as they grow older. And another cry comes up