How Does God Judge a Man?

What is the scriptural model given to us for how God judges the heart of man?  In Proverbs we read:
As in water face reflects face,
so a man's heart reveals the man.
Proverbs 27:19

So we should be looking to the heart of man to reveal his character.  But how do we know what is in the heart?
“Either make the tree good and its fruit good, or else make the tree bad and its fruit bad; for a tree is known by its fruit. Brood of vipers! How can you, being evil, speak good things? For out of the abundance of the heart the mouth speaks. A good man out of the good treasure of his heart brings forth good things, and an evil man out of the evil treasure brings forth evil things. But I say to you that for every idle word men may speak, they will give account of it in the day of judgment. For by your words you will be justified, and by your words you will be condemned.”
Matthew 12:33-37

We know what is in the heart by the words that a man speaks and the actions that he takes. Those words and actions are like seeds being planted. These seeds that the man plants will grow in his own life and in the relationships that he has and eventually will bear fruit.  What kind of fruit will good seed bear?
But the fruit of the Spirit is love, joy, peace, longsuffering, kindness, goodness, faithfulness, gentleness, self-control. Against such there is no law. And those who are Christ’s have crucified the flesh with its passions and desires.
Galations 5:22-26

Love, joy, peace, longsuffering, kindness, goodness, faithfulness, gentleness, and self-control... theses are the fruit that will be present in the life of a godly man and will not be present in the life of an ungodly man.  (Interesting side note: the fruit contains seeds that will result in future good fruit).  The following are verses that describe the different fruits:

Love 
Love suffers long and is kind; love does not envy; love does not parade itself, is not puffed up; does not behave rudely, does not seek its own, is not provoked, thinks no evil; does not rejoice in iniquity, but rejoices in the truth; bears all things, believes all things, hopes all things, endures all things. Love never fails.
1st Corinthians 13:4-8

Joy
Therefore we also, since we are surrounded by so great a cloud of witnesses, let us lay aside every weight, and the sin which so easily ensnares us, and let us run with endurance the race that is set before us, looking unto Jesus, the author and finisher of our faith, who for the joy that was set before Him endured the cross, despising the shame, and has sat down at the right hand of the throne of God.
Hebrews 12:1-2

Peace
Be anxious for nothing, but in everything by prayer and supplication, with thanksgiving, let your requests be made known to God; and the peace of God, which surpasses all understanding, will guard your hearts and minds through Christ Jesus.
Phillipians 4:6-7

Longsuffering
But You, O Lord, are a God full of compassion, and gracious, Longsuffering and abundant in mercy and truth.
Psalm 86:15

Goodness
Then He said, “I will make all My goodness pass before you, and I will proclaim the name of the LORD before you. I will be gracious to whom I will be gracious, and I will have compassion on whom I will have compassion."
Exodus 33:19

 Faithfulness
Through the Lord’s mercies we are not consumed,
Because His compassions fail not.
They are new every morning;
Great is Your faithfulness.
“The Lord is my portion,” says my soul,
“Therefore I hope in Him!”
Lamentations 3:22-24

Gentleness
Take My yoke upon you and learn from Me, for I am gentle and lowly in heart, and you will find rest for your souls.
Matthew 11:29

Self-Control
For a bishop must be blameless, as a steward of God, not self-willed, not quick-tempered, not given to wine, not violent, not greedy for money, but hospitable, a lover of what is good, sober-minded, just, holy, self-controlled, holding fast the faithful word as he has been taught, that he may be able, by sound doctrine, both to exhort and convict those who contradict.
Titus 1:7-9


So,
Keep your heart with all diligence,
For out of it spring the issues of life.
Proverbs 4:23