First, it is plain if we consider what sort of a world this is that we have got into. It is a world a great deal fuller of inducements to do wrong than of inducements to do right; a world in which there are a great many bad things that have a deceptive appearance of pleasure; a great many circumstances in which it seems far easier to follow the worse than to follow the better course. And so, unless a man has learned the great art of saying 'No!' 'So did not I because of the fear of the Lord'; he will come to rack and ruin without a doubt. There are more things round about you that will tempt you downwards than will draw you upwards, and your only security is constant watchfulness. As George Herbert says:--
'Who keeps no guard upon himself is slack, And rots to nothing at the next great thaw.'
And that is what will happen to you, as sure as you are living, in spite of all your good resolutions, unless you back up those resolutions with perpetual jealous watchfulness over yourselves. 'Keep thy heart with all diligence.'
And the same lesson is pealed out to us if we consider what sort of creatures we are that have got into this world all full of wickedness. We are creatures evidently made for self-government. Our whole nature is like a monarchy. There are things in each of us that are never meant to rule, but to be kept well down under control, such as strong passions, desires rooted in the flesh which are not meant to get the mastery of a man, and there are parts of our nature which are as obviously intended to be supreme and sovereign: the reason, the conscience, the will.
There is a deal of pestilent talk which one sometimes hears, amongst young men especially, about 'following nature.' Yes! I say, 'Follow nature!' and nature says, 'Let the man govern the animal!' and 'Do not set beggars on horseback,' nor allow your passions to guide you, but keep a tight hand on them, suppress them, scourge them, rule them by your reason, by your conscience, and by your will.
Suppose a man were to say about a steamship, 'The structure of this vessel shows that it is meant that we should get a roaring fire up in the furnaces, and set the engines going at full speed, and let her go as she will.' Would he not have left out of account that there was a steering apparatus, which was as plainly meant to guide as are the engines to drive? What are the rudder and the wheel for?--do they not imply a pilot? and is not the make of our souls as plainly suggestive of subordination and control? Doth not nature itself teach you that you do not follow, but outrage, nature, when you let your passions rule, and that you only then follow nature when you bow the whole man under the dominion of the conscience, and when conscience stands waiting for the voice of God?
'Unless above himself he can erect Himself, how mean a thing is man!'
You are called upon by the very world that you have come into, and by the very sort of person that you yourself are, to exercise that perpetual watchfulness which is the only condition of cleansing your way. There must be a strong guard on the frontier, which shall examine all the thoughts and purposes and desires that would pass out, and all the temptations and seductions that would pass in; and take care that none shall pass which cannot bring the King's warrant, 'Keep thy heart with diligence.' 'Wherewithal shall a young man cleanse his way? By taking heed thereto.'
III. This constant watchfulness, to be of any use, must be regulated by God's Word. 'Taking heed thereto, according to Thy word.'