THE three references made with respect to a faithful man in the KJV are: 1. Most men will proclaim everyone his own goodness: but a faithful man who can find? (Pro.20:6). Here goodness as it where, is implied. (2). A faithful man shall abound with blessings: but he that maketh haste to be rich shall not be innocent (Pro.28:20). 3. That I gave my brother Hanani, and Hananiah the ruler of the palace, charge over Jerusalem: for he was a faithful man, and feared God above many (Neh. 7:72).
Who then is a faithful man? Why is it difficult to find one? We will limit our discussion to marital faithfulness. This is for the purpose of those that are in the process of choosing their future spouse, and are expressing some concerns or hidden fears as to whether the marriage will remain honourable and the bed undefiled (2Sam. 11:11 Dan. 3:16-18; Heb. 11:32-38), even among believers! The bible gives account of those who exhibited unfaithfulness in their time, irrespective of their “spirituality”; Judah (Gen. 28:13-18 Reuben (Gen. 49:4), David (2Sam. 11:1-4), portiphar’s wife (Gen. 20:16),  1 Cor 5:1-7 With such a seemingly endless list of “unfaithfulness” one begins to imagine the helplessness of mankind in this regard, little wonder then about Agur’s confusion (Prov. 30:19 12:26).
The examples of David (2Sam. 11:1) and Judah (Gen. 20:16) show clearly that you don’t necessarily have to plan to be unfaithful in a crooked and perverse generation (Phil. 2:15 Prov. 23:33) it is designed to happen, unless you preserve yourself (Prov. 6:26) David fell, not because Bathsheba was naked (for that may jolly well have been her carefully designed pathway to the palace!), but because he left his guard. The level of lasciviousness was so high in Corinth that Paul had to encourage them to marry instead of burning with lust
(lCor 7:9), but then, if you marry because you burn, without addressing the issue of burning; you will still burn after marriagel Forsuch a man, unfaithfulness is only some distance away!
Who then can find a faithful man (Prov. 20:6)? Do such men even exist in the first place? The answer is simple, such men existed in the past (Gen. 39:12) and they still exist today, although they are rather scarce! Marriage is God’s idea and He remains irrevocably committed to marital faithfulness and is still in the business of churning out faithful men, but you must device some means to find such men. In finding a faithful man, two clear qualities can safely be attributed; goodness and the fear of God as earlier spelt out. However, no human being has the ability on his/her own to determine with absolute certainty the faithfulness of another person (Jer. 17:9-10) we must rely on God, for He alone knows the hidden motives of the heart (Heb. 4:12)
But we live among men and man looks at the outward (ISam. 16:5 Jn7:24;8:15) how can one begin to explain the actions of David “the man after God’s heart”? How then do we know who a faithful man is? The secret is to develop a deep relationship with God such that He becomes jealous over your soul (Gen. 5:24) and shields you from shallow worshippers (Ps. 4:3; 33:18-19) For the deeper you are with Him, the more difficult it becomes for shallow worshippers to be at home with you (Ps. 42:7), which makes it practically impossible to nurture any relationship that is so deep such that it could possibly lead to marriage with such persons.
A man’s faithfulness is not predicated upon anything other than the fear of God (Prov. 9:10; 15:33). But then, this fear is only the beginning of wisdom, it is intricately linked with an insatiable love for Him, when it is full blown (Hos. 2:14-20). As the relationship with God gets deeper, the lover of God and His ways eventually gets to the point where he wouldn’t want to hurt the God he loves, so he stays faithful (Prov. 8:13), not because he has no fleshly demands not to be, but because he is beginning to understand the divine wisdom behind faithfulness. Job 28:28; 31:1-2, 9-12; Pros: 3-20; 6:23-33; 7:25-27; 9:13-18; 10:21-29; Pros 20:6; 1Cor. 6:13-20 he therefore begins to enter into rest with God in that area. Adultery/premarital sex is only possible with a willing partner that has fallen from grace as at the time the act is committed, so it is a decline ( Pro.7”}! Stay on the highways of holiness) go all the way with God, then He will naturally preserve you for another deep seeker (Pro. 7:1-5) and He will begin to show you deep secrets that remain unrevealed to casual seekers (Job. 29:4  Ps. 25:14;  Prov 3:32 Prov 3).