A word from Spurgeon on how to be wise

"It seemed to me, for a time, that all was well; and, perhaps, I am addressing someone else who says, "Well, if I am not right, I wonder who is; and if I have gone wrong, where must my neighbors be going?" Ah, that is often the way we talk! As long as we are blind, we can see no faults in ourselves; but when the Spirit of God comes to us, and reveals to us the law of God, then we perceive that we have broken the whole of the ten commandments, in the spirit, if not in letter of them. Even the chastest of men may well tremble when they remember that searching word of Christ, "Whoever looketh on a woman to lust after her hath committed adultery with her already in his heart." When you understand that the commandments of God not only forbid wrong actions, but also the desires, and imaginations, and thoughts of the heart, and that, consequently, a man may commit murder while he lies in his bed-may rob his neighbor without touching a penny of his money or any of his goods-may blaspheme God though he never uttered an oath, and may break all the commands of the law, from the first to the last, before he has put on his garments in the morning;-when you come to examine your life in that light, you will see that you are in a very different condition than you thought you were in."
-Charles H. Spurgeon- "Sermons which have won souls"

Why title it "A word from Spurgeon on how to be wise" ?

One of the first verses I memorized as a Christian was...

Psalm 19:7
The law of the LORD is perfect, converting the soul: the testimony of the LORD is sure, making wise the simple.

And Spurgeon starts out with this verse in the beginning of this chapter on conversion. Saying that the moral law is necessary in a persons conversion. And so scripture confirms it by saying that it is "perfect, converting the soul".

2 Corinthians 10:4-5
(For the weapons of our warfare are not carnal, but mighty through God to the pulling down of strong holds;)
Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ.

We have been handed a weapon direct from God himself that hits home in the sinners conscience. Are we to ride on are foolish pride and say that our method is better than the one God provided? We have ten great cannons that according to scripture will pull down the strong holds within a sinner.

Jesus used it.(John 4:7–26,Luke 18:18–21,Luke 10:25-37)

Paul used it.(Acts 24:25 says "And as he reasoned of righteousness, temperance, and judgment to come, Felix trembled, and answered, Go thy way for this time; when I have a convenient season, I will call for thee.". Paul used the law to reason with Felix. How do I know that? God's law is the standard of "righteousness" he expects. He spoke also of "temperance" which as well comes of the law. And "judgment"...the law works wrath. It shows how angry God is at sin. It says felix trembled. Like david sending the stone directly into the forhead of goliath so we must send the stone of the two tablets of God's law straight for the sinner's conscience causing them to "tremble" as they see the law coming after their self-righteousness. And after they are struck by the stone they too like goliath will fall flat on their faces dead to sin.

And here Spurgeon used it. What ever way you present the gospel make sure to use the law first to bring the knowledge of sin (Romans 3:19,20,Romans 7:7,Galatians 3:23-25). This will break the hard heart and then the good news of the gospel will mend it ready for God to work within the person.

Proverbs 11:30
The fruit of the righteous is a tree of life; and he that winneth souls is wise.